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Type 1 Diabetes Daily Management & Insulin Tracking

Every day with Type 1 diabetes involves dozens of medical decisions — each one trackable, each one refinable. This system covers insulin logging, CGM interpretation, carb counting, hypoglycemia prevention, sick day protocols, exercise adjustments, emergency preparedness, and how to walk into your endocrinology appointment with the data that produces real, targeted changes. For more background and examples, see the guidance below; for built-in tools and options, use the quick tools guide.

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Checklistify Editorial Team

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Log fasting glucose from CGM or fingerstick: value, time, and trend arrow if CGM

CGM trend arrows provide critical context that a single number cannot: a glucose of 140 mg/dL with a double-down arrow requires immediate action; the same value with a flat arrow does not. Always log both the value and the trend direction. CGM readings may be 10–15 minutes behind fingerstick — if making a treatment decision on a rapidly changing value, confirm with a fingerstick.

Review overnight CGM trace: time in range, any overnight lows, any overnight highs, and pattern consistency vs. previous nights

Most CGM apps show a 24-hour or overnight graph. Before the morning variables begin, review whether your overnight basal rate is keeping you in range (typically 70–180 mg/dL, or your individualized target). Consistent overnight lows suggest basal is too high; consistent overnight highs suggest basal is too low or evening correction was insufficient. Document the pattern, not just the current reading.

Determine whether any morning glucose rise reflects dawn phenomenon or post-hypoglycemia rebound before making basal adjustments

Dawn phenomenon is a gradual, cortisol-driven glucose rise beginning approximately 3–8am that occurs without any preceding low — it appears as a smooth upward curve on your overnight CGM trace. Post-hypoglycemia rebound shows a dip below your low threshold followed by a rise, as the liver releases stored glucose in response to the nocturnal low. The two patterns require opposite corrections: dawn phenomenon calls for a higher overnight basal rate in the early morning hours, while rebound requires reducing the overnight basal that caused the initial low. A single 3am fingerstick or CGM check on consecutive nights is the most reliable way to distinguish them. Never increase your overnight basal to fight a morning high before ruling out a nocturnal low as the cause.

Log insulin on board (IOB) from previous evening's boluses if relevant to morning correction decisions

Stacking insulin — giving a correction bolus without accounting for active insulin from a previous bolus — is one of the most common causes of severe hypoglycemia. Confirm IOB before any morning correction. Most pumps and CGM-integrated systems display IOB — if using injections, calculate manually based on your insulin's duration of action (typically 3–5 hours for rapid-acting).

Log last night's sleep: total hours, any disruptions for glucose alerts, and whether you treated any nocturnal lows

Sleep deprivation and nocturnal hypoglycemia both affect insulin sensitivity the following day. A night with two low treatments creates a residual glucose instability the next morning that looks like basal rate failure but is actually post-hypoglycemia rebound (Somogyi effect). Log overnight treatments to interpret morning patterns correctly.

Log morning ketone check if fasting glucose is above 250 mg/dL or if you feel unwell

Ketone testing is mandatory before exercise and recommended any time fasting glucose exceeds 250 mg/dL. Use a blood ketone meter for the most accurate reading (fingerstick ketone strips): under 0.6 mmol/L is normal; 0.6–1.5 mmol/L is elevated — increase monitoring frequency; above 1.5 mmol/L is high — contact your care team; above 3.0 mmol/L is critical — seek emergency care immediately.

Note any factors that may affect today's insulin sensitivity: illness, stress, hormonal cycle phase, significant change in physical activity planned

Insulin sensitivity in T1D varies significantly with illness (resistance increases), menstrual cycle phase (luteal phase often increases resistance), stress (cortisol increases resistance), and exercise (increases sensitivity for 24–48 hours post-activity). Flagging these at the start of the day informs your dosing decisions throughout and helps interpret the day's data retrospectively.

Log every meal bolus: time, carbohydrate grams consumed, insulin-to-carb ratio used, calculated dose, and actual dose administered

The gap between calculated dose and actual dose administered — and the post-meal glucose response — is the primary data used to calibrate insulin-to-carb ratios over time. Logging both the calculation and the actual administration captures any intentional adjustments (e.g., pre-bolusing by 15 minutes, reducing dose for anticipated exercise) that affect the outcome.

Log the pre-meal glucose value and the time of pre-bolus (bolus given before eating) if applicable

Pre-bolusing — giving rapid-acting insulin 10–20 minutes before eating — significantly improves post-meal glucose control by matching insulin peak to carbohydrate absorption peak. Log the pre-bolus interval you used (e.g., '15 minutes before') alongside pre-meal glucose so you can identify which interval produces the best post-meal response for your specific insulin.

Log the 2-hour post-meal glucose: target typically 140–180 mg/dL at 2 hours (confirm your target with your endo)

The 2-hour post-meal reading paired with the pre-meal reading and carbohydrate count is the primary data for evaluating insulin-to-carb ratio accuracy. A consistent 2-hour reading above target despite accurate carb counting suggests your I:C ratio needs strengthening for that meal. Log at the same interval consistently — mixing 1-hour and 3-hour post-meal checks makes comparison unreliable.

#10

Log every correction bolus: time, glucose at time of correction, correction factor used, calculated correction dose, and actual dose administered

The correction factor (also called insulin sensitivity factor or ISF) is the number of mg/dL one unit of insulin lowers your glucose. It varies by time of day and requires calibration based on correction bolus outcomes. Logging pre-correction glucose, correction dose, and the glucose 2–3 hours later (when the correction has fully acted) provides the data to evaluate and adjust your ISF.

#11

Log all carbohydrate intake including snacks, beverages, and any glucose treatment for lows

Incomplete carbohydrate logging is the most common source of unexplained glucose variability. Log everything: the half-cup of juice that wasn't covered, the handful of crackers, the glucose tablets. The only way to identify whether your I:C ratios are correct is to ensure all carbohydrates are accounted for in the record.

#12

Account for the delayed glucose effect of high-fat, high-protein meals when planning bolus delivery and timing

Fat and protein significantly slow gastric emptying and produce a delayed glucose rise 2–4 hours after a meal — most pronounced with pizza, pasta with cream sauce, burgers, steak, or any large meal with significant fat content. A standard upfront bolus that produces a good 2-hour reading may result in a 3–5 hour glucose spike as digestion-slowed carbohydrates finally absorb. Pump users can use an extended bolus (dual-wave or combo): typically 40–60% delivered upfront and the remainder extended over 2–3 hours. Injection users can split the bolus or plan a small correction at 2 hours. Log which meal types consistently trigger the delayed rise pattern so you can build meal-specific bolus strategies over time.

#13

Log alcohol consumption with time, type, quantity, and a planned overnight monitoring schedule

Alcohol inhibits hepatic glucose production — the liver's emergency glucose release mechanism — for approximately 8–12 hours after consumption. When sober, a hypoglycemic episode typically triggers the liver to release stored glucose, providing a partial self-correction. With alcohol on board, this mechanism is blocked: a hypoglycemic episode after drinking will not self-correct without treatment, and the symptoms of hypoglycemia (confusion, incoordination) can be indistinguishable from intoxication. Always eat carbohydrates with alcohol, set CGM low alert thresholds lower than your usual nighttime setting, ensure someone with you knows about your T1D and glucagon location, and avoid situations where you would be alone overnight and unable to self-treat.

#14

Note any bolus delivery issues: pump occlusion alert, infusion site that appeared to bleed at insertion, or injection site that bled or leaked

Insulin absorption is affected by injection and infusion site issues in ways that are invisible at the time. An infusion site that bled at insertion often absorbs insulin poorly for that session. Lipohypertrophy (hardened tissue from repeated injection in the same site) causes unpredictable absorption. Log any site issues and rotate sites systematically — document which site was used at each insertion.

#15

Log your CGM time-in-range percentage at the end of each day (target: 70%+ of time in 70–180 mg/dL, or your individualized range)

Time-in-range (TIR) is now the primary metric for T1D glucose management — more clinically informative than HbA1c alone because it captures variability and hypoglycemia exposure, not just average glucose. Log daily TIR and note which part of the day drove most time above or below range.

#16

Log any CGM high alerts: time, glucose value at alert, likely cause, and action taken

Categorize high alerts by likely cause: missed bolus, underestimated carbs, site failure, illness, stress, or unexplained. Pattern analysis of high alert causes over 1–2 weeks identifies the most productive targets for adjustment — whether that is I:C ratio, basal rate, or infusion site rotation.

#17

Log any CGM low alerts: time, glucose value, symptoms experienced, cause if identifiable, and treatment given

Hypoglycemia log entries should include: glucose value at detection, whether CGM or symptoms first alerted you, symptoms present (or absent — hypoglycemia unawareness), treatment used, and glucose 15 minutes post-treatment. The 15-minute recheck confirms treatment adequacy. Recurrent lows at the same time of day are a basal rate or I:C ratio signal.

#18

Review CGM calibration requirements if using a device that requires fingerstick calibration — log calibration times and values

Some CGM sensors require twice-daily fingerstick calibration for accuracy. Missed calibrations cause drift that produces false alerts and misleading trend data. If your device requires calibration, log calibration time and value — missed calibrations often explain otherwise confusing CGM data.

#19

Log sensor insertion date and expiration date — plan replacement before expiration during a stable glucose period

Inserting a new CGM sensor during a glucose excursion or immediately before a meal produces unreliable warm-up readings. Plan sensor changes for a fasted, stable period. Log insertion date so you know when the next change is due — running sensors past expiration produces degrading accuracy.

#20

Log infusion site change: date, time, site location (document rotation — abdomen quadrant, arm, thigh), and any insertion issues

Infusion site rotation is critical for consistent insulin absorption. Document which site was used at each change and rotate systematically. Sites should be changed every 2–3 days maximum — leaving sites in longer increases occlusion risk and absorption variability. A lipohypertrophy map of your common sites is a useful tool to discuss with your diabetes educator.

#21

Log reservoir fill: date, time, insulin volume filled, and insulin type

Running out of insulin in a reservoir overnight is a preventable DKA risk. Log reservoir level at every site change and estimate days of insulin remaining based on your average daily dose. Fill with sufficient buffer — do not refill only when the low reservoir alarm sounds.

#22

Review pump's total daily dose (TDD) from the past 7 days and compare to your current basal + bolus program

Your pump's TDD data tells you whether your actual insulin delivery matches your programmed doses. Consistently higher TDD than your basal program suggests you are correcting frequently — a signal of inadequate basal or I:C ratios. Consistently lower TDD may indicate meal skipping or under-bolusing. Bring 7-day TDD averages to endo appointments.

#23

Log any pump alerts: occlusion, low battery, communication failure with CGM (in closed-loop systems), or auto-mode suspension events

Occlusion alerts require immediate site change and ketone check — an occluded infusion set delivers no insulin while the body continues to produce ketones. Auto-mode suspension events in closed-loop systems (e.g., Tandem Control-IQ, Omnipod 5) often indicate a CGM data gap or glucose value outside the automated system's adjustment range — log and investigate the cause.

#24

Keep fast-acting glucose in a consistent, accessible location at all times: glucose tablets (preferred), juice, or regular soda — log quantities and restock when below minimum

The 15-15 rule: 15 grams of fast-acting carbohydrates for a glucose under 70 mg/dL, recheck in 15 minutes. Glucose tablets are preferred over food because the dose is precise and the response is predictable. Log your supply and restock proactively — discovering an empty glucose tablet tube during a hypoglycemic episode is a preventable emergency.

#25

Confirm glucagon kit or nasal glucagon (Baqsimi) is available, unexpired, and that at least one person in your household knows how to use it

Severe hypoglycemia (unconscious, unable to swallow, or having a seizure) requires glucagon — oral glucose cannot be given safely. Nasal glucagon (Baqsimi) requires no reconstitution and can be administered without training. Confirm expiration date at every monthly review and replace before expiration. Verify household members know its location and have watched the administration instructions.

#26

Log any hypoglycemia event below 70 mg/dL: time, glucose value, symptoms, cause if identifiable, treatment, and recovery glucose at 15 minutes

Hypoglycemia pattern analysis is one of the highest-value activities in T1D management. Recurrent lows at the same time of day, recurrent lows after specific activities, or lows occurring with no identifiable cause are all signals for basal or I:C ratio adjustment. The recovery glucose at 15 minutes confirms treatment adequacy — a value still under 70 mg/dL requires a second treatment.

#27

Assess for hypoglycemia unawareness: note any low confirmed by CGM or fingerstick that was not preceded by symptoms

Hypoglycemia unawareness — the loss of symptomatic warning before significant lows — develops in some people with long-duration T1D and is a serious safety risk. If you are regularly discovering lows via CGM without symptomatic warning, report this to your endocrinologist. Structured programs to restore hypoglycemia awareness (BGAT, HypoCOMPaSS) are available and effective.

#28

Review overnight low risk before bed: check CGM trend, IOB, evening activity level, and set low alert threshold appropriately

Pre-bed assessment significantly reduces overnight hypoglycemia risk. If bedtime glucose is under 90 mg/dL with a downward trend, or if you exercised in the past 4 hours, consider a small bedtime snack with minimal or no insulin. Your endo or diabetes educator can help you develop a specific pre-bed decision tree based on your individual patterns.

#29

Log pre-exercise glucose and exercise type, duration, and intensity

Exercise type significantly determines glucose response: aerobic exercise (running, cycling, swimming) typically lowers glucose and requires dose reduction; anaerobic exercise (weightlifting, HIIT, sprinting) often initially raises glucose due to adrenaline release before a delayed lowering effect. Log the type precisely — the same duration of 'exercise' can require opposite glucose management strategies.

#30

Check ketones before exercise if pre-exercise glucose is above 250 mg/dL

Exercise with elevated glucose and ketones present can rapidly worsen DKA. If pre-exercise glucose is above 250 mg/dL, check blood ketones: above 0.6 mmol/L, postpone exercise, correct with insulin, and recheck before proceeding. Do not exercise through a high glucose if ketones are elevated.

#31

Log pre-exercise insulin adjustment: basal rate reduction (pump users), reduced bolus for pre-exercise meal, or temp basal duration set

Common aerobic exercise adjustments: reduce bolus for the meal 1–2 hours before aerobic exercise by 25–75%; set a reduced temp basal rate (50–80% reduction) starting 60–90 minutes before aerobic exercise. These are starting points — individual response varies significantly and requires personal calibration through documented trial.

#32

Log glucose during exercise at 30-minute intervals for sessions over 45 minutes

Glucose can drop rapidly during sustained aerobic exercise. Log at 30-minute intervals and treat if below 90 mg/dL with 15–20 grams of fast-acting carbohydrates to prevent a low during activity. CGM alarms set to alert at 90 mg/dL (rather than the standard 70 mg/dL) during exercise provide earlier warning.

#33

Log post-exercise glucose at 2 hours and 4 hours after exercise completion

Exercise increases muscle glucose uptake for 24–48 hours post-activity. The 2-hour and 4-hour post-exercise readings capture the most active portion of this sensitivity window. Recurrent post-exercise lows at the same interval suggest basal rate or post-exercise meal bolus reduction is needed. Delayed-onset post-exercise hypoglycemia (overnight after afternoon exercise) is common and traceable.

#34

Perform a sick day ketone check any time you have vomiting, nausea, flu symptoms, or unexplained glucose above 250 mg/dL — log result and action

Diabetic ketoacidosis in T1D can develop within hours when insulin delivery is interrupted or insufficient during illness. Sick days require more frequent glucose and ketone monitoring, not less. Even mild illness (a cold, minor infection) increases insulin resistance significantly and requires proactive dose increases that your sick day protocol should specify.

#35

Confirm your sick day protocol is documented and accessible: insulin dose adjustment rules, when to call your endo vs. go to the ER, and who to contact after hours

Every person with T1D should have a written sick day protocol from their endocrinologist specifying: glucose and ketone check frequency during illness, rules for increasing basal rate or correction doses, fluid and nutrition guidance when not eating, and thresholds requiring emergency care. If you do not have a written sick day protocol, request one at your next appointment.

#36

Log any DKA warning signs: nausea, vomiting, abdominal pain, excessive thirst, frequent urination, fruity breath, or confusion

DKA symptoms with blood ketones above 3.0 mmol/L or urine ketones of large/moderate require emergency care. Do not wait for your endo's office to open. DKA is a life-threatening emergency — the threshold for emergency care is lower, not higher, than for other illnesses.

#37

Review and rotate emergency insulin supplies: pen needles, syringes for pump users (emergency backup for pump failure), and extra insulin vials in appropriate storage

Pump failure without a backup injection plan is a DKA risk. Every pump user should have: a backup insulin pen or syringe supply, knowledge of equivalent injection doses for their programmed basal and bolus rates, and an unexpired backup vial of rapid-acting insulin stored correctly. Review and restock quarterly.

#38

Wear or carry medical alert identification stating Type 1 diabetes and insulin use

Medical alert identification — bracelet, necklace, or wallet card — communicates your T1D and insulin use to emergency responders who may encounter you unconscious or confused from severe hypoglycemia, before you can speak for yourself. The identification should state at minimum: 'Type 1 Diabetes / Insulin Dependent.' Some people also include their glucagon kit location or note it in their phone's emergency medical ID. The American Medical ID and similar providers offer durable, waterproof engraved options. This is a one-time setup step that provides permanent emergency value regardless of how well-controlled your diabetes is at any given time.

#39

Brief household members and regular close contacts on glucagon administration, severe low recognition, and when to call 911

The people who are with you most — partner, roommate, parent, close coworker — are your first response line in a severe hypoglycemic emergency. They need to know: where glucagon is stored, that nasal glucagon (Baqsimi) requires a single squeeze in one nostril and no training, that 911 should be called after administering glucagon even if you appear to recover, and how to distinguish severe hypoglycemia (rapid onset, confusion, seizure, unresponsiveness) from DKA (slower onset with nausea, fruity breath, and excessive thirst). Review this annually and any time someone new becomes a regular presence in your home or daily life.

#40

Configure your phone's emergency medical ID with T1D diagnosis, insulin names and doses, CGM and pump model, allergies, and emergency contacts

Emergency responders are trained to check the medical ID accessible from a phone's lock screen without a passcode. On iOS, configure Medical ID in the Health app (accessible via Emergency on the lock screen). On Android, Emergency Information is in Settings. Include: Type 1 Diabetes diagnosis, rapid-acting and basal insulin names and doses, CGM and pump models if applicable, drug allergies, and at least two emergency contact names and phone numbers. Update immediately after any medication or device change.

#41

Log HbA1c with date at every endo visit (typically every 3 months)

HbA1c reflects average glucose over approximately 3 months. The standard T1D target is below 7.0% for most adults — confirm your individualized target with your endo, as targets vary based on hypoglycemia risk, age, and complication status. Log alongside your average TIR for the same period — the combination of HbA1c and TIR provides a far more complete picture than either metric alone.

#42

Log CGM average glucose, time-in-range, time-below-range, and time-above-range from your device report

Most CGM apps generate an Ambulatory Glucose Profile (AGP) report. The AGP shows: percentage of time in each glucose range, glucose variability, and typical daily glucose patterns. Print or download this report before every endo appointment — it is the most efficient way to communicate your glucose management profile in a short appointment window.

#43

Log annual labs: kidney function (eGFR, urine microalbumin), lipid panel, thyroid function (TSH), and celiac screening if not previously tested

T1D significantly increases risk for: diabetic nephropathy (kidney disease — tracked via eGFR and microalbumin), cardiovascular disease (tracked via lipid panel), and autoimmune thyroid disease and celiac disease (both more common in T1D due to shared autoimmune mechanism). These should be checked annually — track results and trends over years, not just individual values.

#44

Log annual dilated eye exam result and any findings

Diabetic retinopathy is the leading cause of preventable blindness in working-age adults and develops without symptoms until advanced. Annual dilated eye exams detect early changes when intervention is most effective. Log exam date, provider, and any findings. Do not skip this appointment if glucose control has been poor — early detection is most important precisely then.

#45

Log annual foot exam findings: sensation testing, circulation assessment, any skin or nail changes

Peripheral neuropathy and peripheral artery disease increase foot complication risk in T1D even at younger ages than Type 2 due to longer disease duration. Annual professional foot examination supplemented by daily self-inspection is standard of care. Log any findings of reduced sensation, skin breakdown, or circulation changes.

#46

Download and print or export your CGM's Ambulatory Glucose Profile (AGP) report for the past 14–30 days before every appointment

The AGP report is the most efficient communication tool between a T1D patient and their endocrinologist. It shows glucose patterns, variability, and time-in-range in a standardized format that trained endocrinologists can interpret in 2 minutes. Bringing it printed means your appointment addresses patterns rather than spending time describing what your glucose 'usually does.'

#47

Prepare a list of current insulin-to-carb ratios and correction factors for each time period — note which time periods are performing well vs. producing consistent highs or lows

Most T1D patients have 2–4 different I:C ratios and ISFs for different times of day. Knowing which periods are well-controlled and which need adjustment before your appointment allows you to use the appointment for specific ratio calibration rather than general assessment.

#48

List all hypoglycemia events in the past period: frequency per week, timing, severity, and any patterns identified

Recurrent hypoglycemia — even mild — is a clinical priority because it erodes hypoglycemia awareness over time and increases severe hypoglycemia risk. Bringing a structured low log rather than a verbal estimate of 'I've had some lows' gives your endo the specificity needed to make targeted adjustments.

#49

Note any diabetes management burden, burnout symptoms, or quality-of-life concerns to raise explicitly

Diabetes distress — the emotional burden of continuous disease management — affects a significant majority of people with T1D at some point and directly worsens clinical outcomes. It is frequently not raised in appointments because patients don't consider it a 'medical' concern. It is. Name it if it is present.

#50

Calculate weekly average time-in-range and compare to previous week and to your target

Weekly TIR trend is the most actionable metric in T1D self-management. A declining weekly TIR indicates a pattern requiring investigation — illness, change in diet or activity, sensor accuracy issues, or infusion site problems. An improving TIR confirms that a recent adjustment is working.

#51

Identify the most problematic time period of the week: which meal, which time of day, or which activity produced the most out-of-range readings

Focusing adjustment efforts on the single worst-performing time period is more effective than broadly adjusting all ratios simultaneously. Identify it weekly and bring one or two targeted adjustment questions to your next endo appointment.

#52

Review supply inventory: insulin (expiration date on open vials, quantity of unopened backup), CGM sensors, infusion sets, reservoirs, batteries, and hypo treatment supplies

T1D supply shortages create immediate safety risks. Review weekly and order with sufficient lead time. Keep minimum backup supplies: one unopened box of sensors, two infusion set changes, one full backup vial of each insulin type. Insurance reorder windows and supply chain delays make proactive ordering essential.

#53

🧮 The Two Formulas Behind Your Starting Doses

Every insulin-to-carb ratio and correction factor starts somewhere — but many people with T1D received their starting doses years ago and have never seen the math behind them. Two rules of thumb give endocrinologists a mathematically derived starting point before real-world calibration begins. Knowing them helps you evaluate whether your current doses are within a reasonable range and gives you an evidence-based foundation when requesting adjustments.

500 ÷ TDD = I:C ratio

If your total daily dose averages 40 units, 500 ÷ 40 = 12.5, meaning one unit covers approximately 12–13 grams of carbohydrate. This is the Rule of 500 — a population-derived estimate, not a prescription. Your actual ratio may differ substantially, particularly by time of day. Use your pump's 7-day TDD report to check whether your current ratios are mathematically coherent with your actual insulin usage, then refine through post-meal documentation over several weeks.

1800 ÷ TDD = ISF

Using the same 40-unit TDD: 1800 ÷ 40 = 45 mg/dL per unit of correction insulin. This is the Rule of 1800, also called the sensitivity rule (some clinicians use 1700 for more conservative correction). Neither formula accounts for time-of-day variation — most adults need a more aggressive correction factor in the morning and a more lenient one in the afternoon. These formulas give you the benchmark; your documented correction outcomes give you the calibration.

📖 When a Good HbA1c Was the Problem

Daniel, 38, had managed T1D for 22 years. His HbA1c was consistently 6.7–6.9% — a result his previous GP considered excellent. When he switched to an endocrinologist who reviewed his CGM data, the picture changed entirely: his time-below-range was 18%, meaning he spent more than 4 hours per day under 70 mg/dL, including prolonged overnight lows he was no longer feeling. His average glucose was low not because of careful management — but because frequent severe lows were pulling the average down. His endocrinologist's first priority was raising his overnight correction target and reducing aggressiveness, accepting a slightly higher HbA1c in exchange for a dramatically safer glucose profile.

💡 What the HbA1c Number Cannot Show

Clinical endocrinology guidelines now define the acceptable TIR breakdown as: less than 4% of time below 70 mg/dL, less than 1% below 54 mg/dL, and more than 70% in the target range — alongside HbA1c. Two people can share an identical HbA1c of 7.0%: one spending 72% in range with minimal lows, the other spending 55% in range with frequent severe lows. Their clinical risk profiles are entirely different despite the same three-month average. This is why your endo needs both metrics reviewed together, and why your CGM report contains information no blood test can provide.

💰 The Real Cost of T1D — and Where Assistance Exists

Type 1 diabetes is among the most expensive chronic conditions to manage in the United States. Proactive knowledge of cost-reduction resources prevents the dangerous decisions that cost-pressure creates: stretching insulin vials past their safe window, rationing CGM sensors, or delaying supply orders until a shortage becomes a safety risk.

Insulin Access

All three major insulin manufacturers offer affordability programs: Eli Lilly's Insulin Value Program, Novo Nordisk's Patient Assistance Program, and Sanofi's Insulins Valyou Savings Program. ReliOn-brand analog insulins are available without a prescription at Walmart pharmacies at significantly lower cost than brand-name list prices. If cost is affecting your dosing decisions, your diabetes educator can help identify the most appropriate program for your specific situation.

CGM Coverage

Medicare Part B now covers CGM sensors as durable medical equipment for qualifying insulin-using patients — a significant expansion from earlier pharmacy-only classification. Under commercial insurance, prior authorization typically requires documentation of insulin use. Abbott's LibreAssist and Dexcom's Patient Assistance Program offer reduced-cost or no-cost sensors to uninsured or underinsured patients who meet income criteria. Always appeal a denial before accepting it as final.

Pump and Supplies

Insulin pumps are typically covered as durable medical equipment under commercial plans with a copay after deductible. JDRF's TypeOneNation and the Insulin Help nonprofit maintain current assistance program lists. Manufacturer upgrade programs allow in-warranty users to transition to newer devices at lower cost than new acquisition. Approval rates on first prior authorization appeals are meaningfully higher than initial denial rates — persistence pays.

🔍 Diabetes Distress and Depression Are Not the Same Condition

The emotional weight of T1D is real and clinically significant — but what you are experiencing determines how it is treated, and the two most common conditions are frequently confused. Diabetes distress is the specific, rational frustration and exhaustion of managing a relentless condition: the injustice of glucose variability despite effort, the fear of long-term complications, the fatigue of never truly being off-duty. It responds to diabetes-specific interventions — peer support communities (T1D Exchange, TypeOneNation), structured education, direct conversations with your care team about management burden, and where feasible, simplifying the daily protocol. It is not primarily a psychiatric condition and does not primarily respond to antidepressants.

Clinical depression in T1D involves pervasive low mood extending beyond diabetes outcomes, loss of interest in activities unrelated to glucose management, and hopelessness not confined to management results. Both conditions co-occur frequently and reinforce each other in a cycle that directly worsens clinical outcomes: depression impairs self-care motivation, which worsens glucose control, which deepens distress, which worsens depression. The Diabetes Distress Scale (DDS) and the PHQ-9 depression screen are validated, brief tools your care team can administer. Naming either condition explicitly in an appointment is the most effective first step — both frequently go unaddressed when clinical visits focus entirely on glucose data.

⚠️ Insulin restriction for weight control — deliberately under-dosing or omitting insulin to lose weight through urinary glucose excretion — carries severe long-term complication risk and is more prevalent in T1D than widely acknowledged, particularly among young women. It requires specialized eating disorder treatment with T1D-specific expertise. The Diabulimia Helpline (diabulimiahelpline.org) provides dedicated resources and referrals for T1D-specific eating disorders.

🔧 What a T1D-Specialized Endocrinologist Offers That a General Practice Cannot

Endocrinology is a broad specialty covering thyroid, adrenal, pituitary, and metabolic disorders alongside diabetes. A general endocrinology practice sees relatively few T1D patients compared to a diabetes-focused clinic, and the difference in T1D-specific expertise shapes the quality of every appointment in ways that compound over years of care.

✅In-house access to a Certified Diabetes Care and Education Specialist (CDCES) — a clinician trained in the behavioral, nutritional, and practical dimensions of T1D that a 20-minute physician visit cannot fully address.
✅Fluency with multiple CGM and pump platforms — pulling device reports (Dexcom Clarity, LibreView, Tandem t:connect, Omnipod app) directly in-office rather than asking you to describe glucose patterns verbally during a short appointment.
✅Proficiency in ratio and basal rate optimization based on CGM pattern analysis — not only HbA1c-based adjustments made quarterly without device data context.
✅Access to clinical trials and emerging therapies — beta cell preservation research, next-generation closed-loop systems, and adjunct medications that general practices rarely participate in or offer.

The JDRF T1D Healthcare Provider Finder and the Association of Diabetes Care and Education Specialists (ADCES) provider directory are practical starting points for locating T1D-focused practices. Most now offer telehealth appointments for CGM data review and dose adjustments, removing geography as a barrier to specialized care.

📝 If Pregnancy Is Being Considered: T1D Targets Change Significantly

Pregnancy with T1D achieves excellent outcomes when managed proactively — but the glucose targets shift substantially from standard management. The recommended CGM range during pregnancy is 63–140 mg/dL (versus the standard 70–180 mg/dL), with a time-in-range goal of 70% or more within this narrower window. Insulin requirements typically decrease in the first trimester, increase substantially in the second and third (sometimes doubling or more), and drop sharply at delivery. Pre-conception HbA1c below 6.5% is associated with the best fetal outcomes, making a pre-conception appointment with your endocrinologist — ideally months before attempting pregnancy — the highest-leverage preparation step. A maternal-fetal medicine specialist should join your care team once pregnancy is confirmed.

🧊 Insulin Storage: The Silent Cause of Unexplained High Glucose

Temperature-damaged insulin is one of the most underdiagnosed causes of sudden, unexplained glucose deterioration in T1D. Degraded insulin looks identical to effective insulin — it produces no visible change until severe degradation creates cloudiness or particles, by which point it has been ineffective for some time already. The only early indicator is glucose that stops responding to corrections that previously worked reliably, with no other identifiable cause.

Storage Rules

Unopened vials and pens: refrigerate at 36–46°F; shelf life typically 2 years from manufacture date
Open vials and pens in active use: room temperature up to 77–86°F for 28–30 days maximum — verify the exact window in your specific insulin's package insert, as it varies by brand
Never freeze insulin — freezing destroys it irreversibly even if the vial thaws completely clear with no visible change
Never leave insulin in a vehicle — summer car interior temperatures routinely exceed 120°F, well above the degradation threshold for all insulin types

🚨 When to Suspect Temperature Damage

Visible cloudiness or white particles in a clear insulin vial (rapid-acting insulin should always be water-clear)
Corrections that previously produced reliable results suddenly stop working, with no other identifiable cause such as illness or site issues
Unexplained glucose elevation that began after a travel day, an extended outdoor event, or a power outage affecting refrigeration
When in doubt, discard the vial and open a fresh one — the cost of wasted insulin is always less than the cost of a hospitalization or extended DKA recovery

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Start Here

1
Click any item row to mark it complete.
2
Use the note row under each item for quick notes.
3
Use the tool row for undo, redo, reset, and check all.
4
Use Save Progress when you want to continue later.

Checklist Row Tools

UndoRedoResetCheck allCollapse/Expand sectionsShow/Hide detailsInline notes

Top Action Buttons

Open all sharing and export options in one menu.

Email DraftContinue on another devicePrint or Save as PDFPlain Text (.txt)Word (.docx)Excel (.xlsx)

Add & Ask

Open one menu for apps and AI guidance.

NotionTodoist CSVChatGPTClaude

Copy and customize

Create a new editable checklist pre-filled with your chosen content.

Save Progress

Adds this checklist to My Checklists and keeps your progress in this browser.

Most Natural Usage

Track over time

Check items -> Add notes where needed -> Save Progress

Send or export

Open Share -> Choose format -> Continue

Make your own version

Copy and customize -> Open create page -> Edit freely