Type 1 diabetes (chronic outpatient — pediatric + adult)
Encounter flow
12/12 authoredCanonical 12-phase frame with authored status for this dossier.
Frame
Confirm T1DM — autoantibody / low C-peptide / DKA at onset / classic presentation in young patient; rule out T2 / MODY / steroid-induced (ADA 2026 §2; ISPAD 2022)
T1DM diagnosis confirmed
Patient inputs (20)
Pediatric (ISPAD 2022) vs adult (ADA 2026) framework; technology eligibility (pump, CGM, AID); A1c target individualisation
Insulin TDD weight-based 0.4-0.8 U/kg/day (ADA 2026 §7; ISPAD 2022); ICR / CF derivation
BP control reduces CV and renal events (DCCT NEJM 1993; Nathan NEJM 2005); ADA 2026 target <130/80 if higher CV risk
Drives technology workflow; AID is PREFERRED delivery with NO C-peptide/autoAb/duration pre-req (ADA 2026 Rec 7.25a / 7.8a)
Frequency, severity, awareness — drives target relaxation + CGM / AID (ADA 2026 §7; ISPAD 2022)
Insulin formulations + ratios; β-blocker masking; steroid effect (ADA 2026 §7)
Diagnostic + target tracking + regimen titration (ADA 2026 §2, §7)
Random / fasting / OGTT; severity at presentation (ADA 2026 §2)
Ketone screen at diagnosis and during sick days (ISPAD 2022; NICE 2024 NG18)
DKA screen at presentation (ISPAD 2022)
Baseline renal function (ADA 2026 §11)
Diabetic kidney disease screening — annual ≥5 yr after diagnosis or at puberty in peds (ADA 2026 §11; ISPAD 2022)
Pregnancy mandates strict targets, pump / AID often preferred, retinopathy screen (ADA 2026 §15)
Autoimmune cluster — thyroid, celiac, Addison (ADA 2026 §4; ISPAD 2022)
Depression, eating disorder (diabulimia), DKA risk (ADA 2026 §5)
Low C-peptide differentiates T1 vs T2 (ADA 2026 §2)
GAD65, IA-2, ZnT8, insulin autoantibodies — confirms T1 (ADA 2026 §2; ISPAD 2022)
Annual lipid; statin candidacy in adolescents (ADA 2026 §10; ISPAD 2022)
Autoimmune thyroid disease comorbidity — Hashimoto, Graves (ADA 2026 §4; ISPAD 2022)
Celiac screen — high T1DM comorbidity (ADA 2026 §4; ISPAD 2022)
* = hard-required. Engine cannot meaningfully run until these are filled.
Severity triggers (7)
- informationallife_threateningdka_at_presentation_or_sick_dayHyperglycaemia + ketones ≥3 mmol/L + acidosis — pH <7.30 / HCO3 <15 (ISPAD 2022)Trigger could not be auto-evaluated — needs clinician judgement.
- informationallife_threateningsevere_hypoglycemia_neuroSevere hypoglycaemia with seizure / loss of consciousness / inability to swallow (ADA 2026 §7; ISPAD 2022)Trigger could not be auto-evaluated — needs clinician judgement.
- informationalseverehypoglycemia_unawarenessRecurrent hypoglycaemia with loss of warning symptoms (ADA 2026 §7)Trigger could not be auto-evaluated — needs clinician judgement.
- informationalseverepump_failure_or_occlusionPump alarm, site failure, no insulin delivery suspicion, or rapid hyperglycaemia + ketones in pump user (ISPAD 2022)Trigger could not be auto-evaluated — needs clinician judgement.
- informationalsevereeating_disorder_with_insulin_omissionPatient deliberately omitting insulin for weight control (diabulimia) — recurrent DKA, weight loss, A1c >9% (ADA 2026 §5)Trigger could not be auto-evaluated — needs clinician judgement.
- informationalseverepregnancy_suboptimal_controlPregnancy or planning, A1c >7% or out-of-range time elevated (ADA 2026 §15)Trigger could not be auto-evaluated — needs clinician judgement.
- informationalmoderatea1c_above_9_sustainedA1c >9% sustained despite intervention (ADA 2026 §7)Trigger could not be auto-evaluated — needs clinician judgement.
Workflow calculators
Run this disease's risk and dosing calculators inline.
Recommended regimen
T1DM basal-bolus insulin regimen (MDI) — peds + adult- insulin glarginefirst linelong_acting_basal_insulinTDD 0.4-0.8 U/kg/day (peds 0.5-1.0 U/kg/day in honeymoon; up to 1.5 U/kg/day in puberty); 50% as basal once daily • SC • once daily (or BID for U-100 if duration <24 h)Long-acting analog basal; onset 1–2 h, no pronounced peak, duration 20–24 h. Intensive glycaemic control ↓ retinopathy 76% (95% CI 62–85), nephropathy 39–54%, neuropathy 60% (DCCT, PMID 8366922); long-term any-CVD ↓30% (7–48) at 30 y (DCCT/EDIC, PMID 26861924). ADA 2026 §7; ISPAD 2022rxcui 274783
- insulin degludecfirst lineultra_long_acting_basal_insulin50% of TDD as basal once daily • SC • once dailytriggers: need_for_flexible_dosing_window, reduced_nocturnal_hypoglycemia_targetOnset 1 h, flat PK, duration >42 h. SWITCH-1: overall symptomatic hypo RR 0.89 (0.85–0.94), nocturnal RR 0.64 (0.56–0.73), severe hypo 10.3% vs 17.1% (RD −6.8%, −10.8 to −2.7) vs glargine U-100 (PMID 28672316); DEVOTE severe-hypo RR 0.60 (PMID 28605603); ADA 2026 §7rxcui 1670007
- insulin lisprofirst linerapid_acting_prandial_insulin50% of TDD divided across meals; ICR ≈ 500/TDD; CF ≈ 1800/TDD • SC • before meals (or 5-15 min before for ultra-rapid)Prandial component; onset 15 min, peak 1–2 h, duration 3–5 h (CF 1800/TDD with rapid analog, 1500/TDD with regular insulin) (ADA 2026 §7; ISPAD 2022)rxcui 86009
- insulin aspartfirst linerapid_acting_prandial_insulinSame as lispro • SC • before mealsEquivalent prandial (ADA 2026 §7)rxcui 51428
- insulin glulisinefirst linerapid_acting_prandial_insulinSame as lispro • SC • before mealsEquivalent prandial (ADA 2026 §7)rxcui 400008
- faster aspart (insulin aspart fast)first lineultra_rapid_acting_prandial_insulinSame as standard rapid • SC • 0-2 min before or 20 min after meal starttriggers: post_meal_dosing_preferred_in_young_childrenFaster onset for tighter post-prandial control; pediatric flexibility (ADA 2026 §7; ISPAD 2022)rxcui 51428
outpatient playbook — drug actions (6)
- 1. long-acting basal insulin (glargine / degludec / detemir)50% TDD once daily (or BID) • SC • dailytrigger: New diagnosis or maintenanceBasal-bolus backbone (ADA 2026 §7; ISPAD 2022)
- 2. rapid-acting insulin (lispro / aspart / glulisine / faster aspart)50% TDD divided across meals; ICR 500/TDD; CF 1800/TDD • SC • before meals + correctionstrigger: Each meal + correctionPrandial (ADA 2026 §7)
- 3. CGMPer device; TIR >70%, TBR <70 <4% • SC sensor • continuoustrigger: All T1DM at onset and thereafter per ADA 2026 Rec 7.15Standard of care at onset; HbA1c −0.6% (−0.8 to −0.3) DIAMOND PMID 28118453; −0.43% GOLD PMID 28118454; hypo IRR 0.28 HypoDE PMID 29459019
- 4. AID / hybrid closed-loop (PREFERRED delivery)Per device + endocrinology • SC pump • continuoustrigger: All T1DM — AID is PREFERRED delivery (ADA 2026 Rec 7.25a); no C-peptide/autoAb/duration pre-req (Rec 7.8a)TIR +11 pp (95% CI 9–14), HbA1c −0.33 pp vs SAP (iDCL Control-IQ PMID 31618560); 780G best in 28-RCT network meta PMID 39298688
- 5. ACE inhibitor or ARBLisinopril 5-10 mg or losartan 50 mg • PO • dailytrigger: UACR ≥30 mg/g or HTNRenoprotection (ADA 2026 §11)
- 6. statinAtorvastatin 10-20 mg (peds 10 mg ≥10 yr per ADA 2026 if LDL ≥100 after lifestyle) • PO • dailytrigger: CV risk per ADA 2026 §10CV reduction (ADA 2026 §10; Nathan NEJM 2005)
Auto-drafted A&P note
outpatientSubjective
- Possible entry pathways: HbA1c ≥6.5% / random glucose ≥200 with symptoms / 2-h OGTT ≥200 / fasting ≥126 (ADA 2026 §2); Polyuria + polydipsia + weight loss + fatigue ± nocturnal enuresis (ADA 2026 §2; ISPAD 2022); Positive GAD65 / IA-2 / ZnT8 / insulin autoantibody (ADA 2026 §2; ISPAD 2022).
Objective
- No vitals, labs, or imaging entered for this encounter.
Assessment
**Type 1 diabetes (chronic outpatient — pediatric + adult)** (endo.t1dm.v1).
Phenotype framing: Diabetes-classification partition: T1 (autoimmune, ≥1 islet autoAb, low C-peptide|concurrent-glucose) vs LADA (adult slow-onset autoimmune) vs ketosis-prone/DKA-presenting T2 (obese adolescent/young adult) vs MODY (AD family hx, autoAb-negative, C-peptide preserved) vs pancreatogenic-T3c (post-pancreatectomy/CF/chronic pancreatitis) vs neonatal/monogenic (<6 mo). Stage-1/2 presymptomatic T1D (≥2 autoAb, not stage-3) → route OUT to prevention path (teplizumab stage-2; TN-10 HR 0.41 (0.22–0.78), PMID 31180194). See endo.t1dm.v1.{differentials,finding-lrs}.ts (ADA 2026 §2)
Scope: Confirm T1DM — autoantibody / low C-peptide / DKA at onset / classic presentation in young patient; rule out T2 / MODY / steroid-induced (ADA 2026 §2; ISPAD 2022)
No severity triggers fired against current inputs.Plan
Regimen axis: **T1DM basal-bolus insulin regimen (MDI) — peds + adult** — step "Starting total daily dose (TDD) — new diagnosis or switch from pump". 1. insulin glargine TDD 0.4-0.8 U/kg/day (peds 0.5-1.0 U/kg/day in honeymoon; up to 1.5 U/kg/day in puberty); 50% as basal once daily SC once daily (or BID for U-100 if duration <24 h) (long_acting_basal_insulin, first line) — Long-acting analog basal; onset 1–2 h, no pronounced peak, duration 20–24 h. Intensive glycaemic control ↓ retinopathy 76% (95% CI 62–85), nephropathy 39–54%, neuropathy 60% (DCCT, PMID 8366922); long-term any-CVD ↓30% (7–48) at 30 y (DCCT/EDIC, PMID 26861924). ADA 2026 §7; ISPAD 2022 2. insulin degludec 50% of TDD as basal once daily SC once daily (ultra_long_acting_basal_insulin, first line) — Onset 1 h, flat PK, duration >42 h. SWITCH-1: overall symptomatic hypo RR 0.89 (0.85–0.94), nocturnal RR 0.64 (0.56–0.73), severe hypo 10.3% vs 17.1% (RD −6.8%, −10.8 to −2.7) vs glargine U-100 (PMID 28672316); DEVOTE severe-hypo RR 0.60 (PMID 28605603); ADA 2026 §7 3. insulin lispro 50% of TDD divided across meals; ICR ≈ 500/TDD; CF ≈ 1800/TDD SC before meals (or 5-15 min before for ultra-rapid) (rapid_acting_prandial_insulin, first line) — Prandial component; onset 15 min, peak 1–2 h, duration 3–5 h (CF 1800/TDD with rapid analog, 1500/TDD with regular insulin) (ADA 2026 §7; ISPAD 2022) 4. insulin aspart Same as lispro SC before meals (rapid_acting_prandial_insulin, first line) — Equivalent prandial (ADA 2026 §7) 5. insulin glulisine Same as lispro SC before meals (rapid_acting_prandial_insulin, first line) — Equivalent prandial (ADA 2026 §7) 6. faster aspart (insulin aspart fast) Same as standard rapid SC 0-2 min before or 20 min after meal start (ultra_rapid_acting_prandial_insulin, first line) — Faster onset for tighter post-prandial control; pediatric flexibility (ADA 2026 §7; ISPAD 2022) Setting playbook (outpatient) — Achieve and maintain glycaemic targets with minimal hypoglycaemia, prevent DKA, and screen for / manage complications 7. long-acting basal insulin (glargine / degludec / detemir) 50% TDD once daily (or BID) SC daily — New diagnosis or maintenance (Basal-bolus backbone (ADA 2026 §7; ISPAD 2022)) 8. rapid-acting insulin (lispro / aspart / glulisine / faster aspart) 50% TDD divided across meals; ICR 500/TDD; CF 1800/TDD SC before meals + corrections — Each meal + correction (Prandial (ADA 2026 §7)) 9. CGM Per device; TIR >70%, TBR <70 <4% SC sensor continuous — All T1DM at onset and thereafter per ADA 2026 Rec 7.15 (Standard of care at onset; HbA1c −0.6% (−0.8 to −0.3) DIAMOND PMID 28118453; −0.43% GOLD PMID 28118454; hypo IRR 0.28 HypoDE PMID 29459019) 10. AID / hybrid closed-loop (PREFERRED delivery) Per device + endocrinology SC pump continuous — All T1DM — AID is PREFERRED delivery (ADA 2026 Rec 7.25a); no C-peptide/autoAb/duration pre-req (Rec 7.8a) (TIR +11 pp (95% CI 9–14), HbA1c −0.33 pp vs SAP (iDCL Control-IQ PMID 31618560); 780G best in 28-RCT network meta PMID 39298688) 11. ACE inhibitor or ARB Lisinopril 5-10 mg or losartan 50 mg PO daily — UACR ≥30 mg/g or HTN (Renoprotection (ADA 2026 §11)) 12. statin Atorvastatin 10-20 mg (peds 10 mg ≥10 yr per ADA 2026 if LDL ≥100 after lifestyle) PO daily — CV risk per ADA 2026 §10 (CV reduction (ADA 2026 §10; Nathan NEJM 2005)) Non-pharmacologic actions: - Carb counting education (ADA 2026; ISPAD 2022) - Sick day rules education (ISPAD 2022; ADA 2026) - Hypoglycaemia management training rule of 15 glucagon (ADA 2026; ISPAD 2022) - Exercise + alcohol counselling (ADA 2026) - Mental health support / referral (ADA 2026) - Annual retinal exam (ADA 2026) - Annual foot exam in adults (ADA 2026) - Vaccinations flu pneumococcal COVID hep B in adults (ADA 2026) - Transition planning for adolescents (ADA 2026; ISPAD 2022) AVOID / contraindication checks: - Do not omit basal insulin even when NPO (ADA 2026; ISPAD 2022) - Check ketones at glucose >=250 during illness (ISPAD 2022; ADA 2026) - DKA protocol if ketones >=3 or pH <7.30 or HCO3 <15 (ISPAD 2022) - Hypoglycemia unawareness relax target temporarily (ADA 2026; DCCT 1993) - Pump failure revert to MDI immediately with basal dose (ISPAD 2022; ADA 2026) - SGLT2i off label in T1D — euglycemic DKA risk; inTandem3 DKA 3.0% vs 0.6% placebo (PMID 28899222); selected patients only, hold on illness/procedure/low carb, mandatory sick day ketone monitoring (ADA 2026 §9) - Pramlintide requires 30 50% prandial insulin reduction on initiation to avoid severe hypoglycemia (ADA 2026 §9; PMID 22804102) - Do not delay life saving insulin pending diabetes classification workup (ADA 2026 §2)
Monitoring
Regimen monitoring: - A1c q3mo or q6mo if stable and at target; individualised <7.0% (ADA 2026 §6) - CGM TIR 70-180 mg/dL >70% target for most (individualised band; ATTD/Battelino consensus; ADA 2026 Fig 6.1) - CGM TBR <70 <4% and TBR <54 <1%; TAR >180 <25% (ATTD/Battelino consensus; ADA 2026) - BP each visit (ADA 2026) - UACR and creatinine annually after 5 yr diagnosis or at puberty (ADA 2026; ISPAD 2022) - lipid panel annually (ADA 2026) - TSH q1 to 2 yr (ADA 2026; ISPAD 2022) - tTG IgA at diagnosis then periodically (ADA 2026; ISPAD 2022) - retinal exam annually after baseline (ADA 2026) - foot exam annually in adults (ADA 2026) - pump or AID data download each visit (ADA 2026) Setting (outpatient) monitoring: - A1c q3 mo or q6 mo if stable + at target (ADA 2026) - BP each visit (ADA 2026) - Annual UACR + creatinine after 5 y duration or at puberty in peds (ADA 2026; ISPAD 2022) - Annual lipid panel (ADA 2026) - TSH q1-2 yr (ADA 2026; ISPAD 2022) - Periodic tTG-IgA (ADA 2026; ISPAD 2022) - Annual retinal exam after baseline (ADA 2026) - CGM data download each visit (ADA 2026) Follow-up plan: Continued education, technology upgrades, mental health, reproductive counselling, transition — adolescent to adult care (ADA 2026 §14; ISPAD 2022), vaccinations (ADA 2026 §4) - Close-out criterion: Long-term plan documented Monitoring phase: A1c q3 mo or q6 mo if stable (ADA 2026 §6), CGM TIR/TBR/TAR monthly (TIR >70%, TBR <70 <4%; ATTD/Battelino; ADA 2026 Fig 6.1 individualised), BP each visit, UACR + creatinine annually (ADA 2026 §11), lipid annually (ADA 2026 §10), retinal annually (ADA 2026 §12), foot exam annually (adults), TSH q1-2 yr, tTG-IgA periodically (ISPAD 2022); pump / AID download review
Disposition
Current setting: outpatient — Achieve and maintain glycaemic targets with minimal hypoglycaemia, prevent DKA, and screen for / manage complications Disposition criteria: - Continue outpatient if controlled / improving (ADA 2026) - Refer to specialty team for technology, pregnancy, severe hypo, complications (ADA 2026) Escalation triggers (move to higher acuity): - DKA → ED + endo on call (ISPAD 2022; ADA 2026) - Severe hypoglycaemia with seizure / loss of consciousness → ED + glucagon + admission consideration (ADA 2026; ISPAD 2022) - Pregnancy → preconception / OB-MFM + endo team (ADA 2026) - Eating disorder + insulin omission → mental health admission + endo (ADA 2026) - A1c >9% sustained → multidisciplinary diabetes team (ADA 2026; DCCT 1993)
Patient Action Plan
**T1DM action plan — sick day rules + hypoglycaemia management** Personalised values: weight_kg, TDD_units, ICR, CF, basal_insulin_name_dose, rapid_insulin_name, CGM_or_meter, pump_or_AID_status, glucagon_supply_location. **Doing well — glucose 70-180 mg/dL, no ketones, feeling well** (green): Triggers: - Glucose 70-180 mg/dL (ADA 2026) - No symptoms of hypo or hyper (ADA 2026) - Eating + drinking normally (ADA 2026) - Time-in-range >=70% (Danne 2017; ADA 2026) Actions: - Continue routine insulin basal + meal boluses with carb counting (ADA 2026) - Continue CGM / SMBG schedule (ADA 2026) - Continue routine carb intake and physical activity (ADA 2026) - Keep follow-up appointments (ADA 2026) - Confirm glucagon supply not expired and accessible (ADA 2026; ISPAD 2022) **Caution — sick day OR glucose 70 → low / hyperglycaemia / mild ketones** (yellow): Triggers: - Illness — fever, vomiting, diarrhoea, viral / bacterial infection (ISPAD 2022) - Glucose >=250 mg/dL OR <70 mg/dL with symptoms (ADA 2026; ISPAD 2022) - Ketones 0.6-1.5 mmol/L (ISPAD 2022) - Pump site failure / line air bubble suspected (ISPAD 2022) Actions: - NEVER stop basal insulin — even when not eating (ADA 2026; ISPAD 2022) - Check ketones if glucose >=250 mg/dL OR ill (ISPAD 2022; ADA 2026) - If glucose <70: rule of 15 — 15-20 g fast carbs juice glucose tabs recheck in 15 min repeat if still <70; in peds use 0.3 g/kg max 15 g (ADA 2026; ISPAD 2022) - If glucose >=250 + ketones 0.6-1.5: give correction dose with rapid-acting per CF; encourage water; recheck glucose + ketones in 2 h (ISPAD 2022) - Hydration: water or sugar-free fluids if hyperglycaemic; sugar-containing fluids if normo / hypo and unable to eat (ISPAD 2022) - Continue close monitoring q2-4h (ISPAD 2022; ADA 2026) - Contact diabetes team if not improving in 4-6 h (ISPAD 2022) Contact provider when: - Ketones rising or persistently >0.6 mmol/L (ISPAD 2022) - Vomiting persists (ISPAD 2022) - Pump failure unable to resolve (ISPAD 2022; ADA 2026) - Glucose persistently >300 mg/dL despite correction (ISPAD 2022) - Recurrent hypoglycaemia (ADA 2026) **Medical alert — DKA risk OR severe hypoglycaemia** (red): Triggers: - Ketones >=3 mmol/L OR pH <7.30 if measured OR HCO3 <15 (ISPAD 2022) - Vomiting + glucose >=250 + ketones (ISPAD 2022) - Drowsiness, deep / fast breathing Kussmaul, abdominal pain, fruity breath (ISPAD 2022) - Severe hypoglycaemia: unable to swallow, seizure, loss of consciousness (ADA 2026; ISPAD 2022) - Glucose <54 mg/dL with confusion / agitation (ADA 2026) Actions: - For DKA: call 911 / go to ED immediately; continue basal insulin; sip water if able; bring glucose meter + CGM data + insulin list (ISPAD 2022; ADA 2026) - For severe hypoglycaemia: caregiver gives glucagon — IM 0.5 mg <25 kg / <6 yr or 1 mg >=25 kg OR nasal glucagon 3 mg OR dasiglucagon 0.6 mg autoinjector — call 911 (ADA 2026; ISPAD 2022) - Place patient in recovery position if unconscious; do not give oral food / drink (ADA 2026) - Recheck glucose in 15 min; repeat glucagon once if no response (ADA 2026; ISPAD 2022) - After recovery, give 15-20 g long-acting carbs + protein (ADA 2026) Contact provider when: - Any red zone event — ED + diabetes team within 24 h (ADA 2026; ISPAD 2022)
Earlier-Return Triggers
Return-precaution thresholds (watch for): - [LIFE_THREATENING] Hyperglycaemia + ketones ≥3 mmol/L + acidosis — pH <7.30 / HCO3 <15 (ISPAD 2022) - [LIFE_THREATENING] Severe hypoglycaemia with seizure / loss of consciousness / inability to swallow (ADA 2026 §7; ISPAD 2022) - [SEVERE] Recurrent hypoglycaemia with loss of warning symptoms (ADA 2026 §7)
Citations
- ADA Standards of Care in Diabetes 2026 (Diabetes Care 49 Suppl 1; AID-preferred Rec 7.25a, no-prereq Rec 7.8a, CGM-at-onset Rec 7.15) + ISPAD 2022/2024 + ATTD/Battelino time-in-range consensus + DCCT/EDIC long-term outcomes [PMID:8366922](https://pubmed.ncbi.nlm.nih.gov/8366922/) - Cited evidence (PMID 16371630) [PMID:16371630](https://pubmed.ncbi.nlm.nih.gov/16371630/) - Cited evidence (PMID 26861924) [PMID:26861924](https://pubmed.ncbi.nlm.nih.gov/26861924/) - Cited evidence (PMID 31618560) [PMID:31618560](https://pubmed.ncbi.nlm.nih.gov/31618560/) - Cited evidence (PMID 39298688) [PMID:39298688](https://pubmed.ncbi.nlm.nih.gov/39298688/) Last reconciled with current guidelines: 2026-05-22.
- ADA Standards of Care in Diabetes 2026 (Diabetes Care 49 Suppl 1; AID-preferred Rec 7.25a, no-prereq Rec 7.8a, CGM-at-onset Rec 7.15) + ISPAD 2022/2024 + ATTD/Battelino time-in-range consensus + DCCT/EDIC long-term outcomes — PMID:8366922
- Cited evidence (PMID 16371630) — PMID:16371630
- Cited evidence (PMID 26861924) — PMID:26861924
- Cited evidence (PMID 31618560) — PMID:31618560
- Cited evidence (PMID 39298688) — PMID:39298688