Urgent Care · Common Complaints
Hyperglycemia / Hypoglycemia Concerns
Hypoglycemia is immediately dangerous — correct it before anything else. Hyperglycemia decisions hinge on whether DKA or HHS is possible. This page covers the can't-miss diagnoses (severe hypoglycemia with AMS or seizure, DKA, HHS, sepsis presenting as hyperglycemia, MI presenting with hyperglycemia, adrenal crisis, insulin pump failure), red flags including glucose < 60 with symptoms or < 50 regardless, ketones, hypotension, AMS, the minimum safe first-pass workup (POC glucose, urine and serum ketones, BMP, anion gap calculation, ECG when indicated), in-office treatment of hypoglycemia (15-15 rule, IM glucagon when needed) and mild hyperglycemia, escalation criteria, documentation, and discharge education with sick-day rules and return precautions. Written for NPs, PAs, and MDs in outpatient practice.
Full clinical workflow, red flags, dosing, and documentation below. Subscribe to read the full guide.
Urgent Care · Common Complaints
Hyperglycemia / Hypoglycemia Concerns
Why this symptom matters
Hypoglycemia is immediately dangerous; correct it before anything else. Hyperglycemia decisions hinge on whether DKA/HHS is possible.
What must I not miss first?
- Severe hypoglycemia with AMS or seizure
- DKA
- HHS
- Sepsis presenting as hyperglycemia
- MI presenting with hyperglycemia
- Adrenal crisis
- Insulin pump failure
Red flags — escalate or work up urgently
- Glucose < 60 with symptoms or < 50 regardless
- AMS, seizure, focal deficit
- Glucose > 300 with vomiting, abdominal pain, Kussmaul breathing, fruity breath
- Ketones in urine, anion-gap acidosis if available
- New polyuria/polydipsia + dehydration in older adult (HHS)
- Type 1 diabetic with insulin interruption or pump failure
- Sepsis criteria with hyperglycemia
Immediate Management — While You Work It Up
- Hypoglycemia — give 15–20 g fast-acting carbohydrates PO if patient is conscious and able to swallow safely: juice, glucose tablets, or regular soda. Give dextrose 25 g IV push if patient cannot swallow or is unconscious. Glucagon 1 mg IM if no IV access available. Recheck glucose in 15 minutes. Repeat treatment if still < 70. Do not discharge until glucose is stable > 80 on two consecutive checks.
- Hyperglycemia without DKA — IV fluids NS 1 L over 1 hour. Check BMP, fingerstick ketones, and calculate anion gap before any insulin decision. If uncomfortable managing in urgent care, stabilize with fluids and send to ED.
- DKA criteria — glucose > 250 plus ketones plus anion gap acidosis. This is an ED diagnosis. Start IV fluids immediately, call 911, and do not discharge regardless of how well the patient appears.
- HHS criteria — glucose > 600 plus altered mental status plus no significant ketosis. Call 911. Start fluids while waiting.
- Document every glucose check with time, value, and intervention given.
Minimum safe first-pass workup
- What to ask: diabetes type, regimen, last meal, last insulin/medication, recent illness/infection, vomiting, missed doses, pump status, alcohol
- What to examine: vitals, mental status, hydration, abdominal exam, respiratory pattern (Kussmaul), source of infection
- POC glucose immediately
- UA for ketones, glucose
- BMP if available — anion gap, K, bicarb
- POC ketones if available
What can usually be managed outpatient
- Hypoglycemia corrected with oral carbs, asymptomatic, glucose > 100, can eat: 15-15 rule, then complex carbs + protein, identify cause, adjust regimen
- Mild hyperglycemia (200–350) without ketones, normal mentation, no vomiting: hydrate PO, correction insulin, address cause (illness, missed dose), close follow-up
- Sick-day rules counseling for diabetics; do not stop basal insulin
When to escalate to ED / higher level of care
- Hypoglycemia from sulfonylurea (recurrence common — observe or send to ED)
- Hypoglycemia with AMS not fully recovered after correction
- Hyperglycemia with vomiting, ketones, abdominal pain, Kussmaul breathing — DKA workup
- Glucose > 600 in older adult with AMS — HHS
- Sepsis criteria, infection source needing IV abx
- Insulin pump failure in T1DM and unable to manage with injections
What to document when the diagnosis is still uncertain
- Initial glucose, repeat after treatment, mental status pre- and post-treatment
- Likely cause (missed dose, illness, sulfonylurea, etc.)
- "DKA / HHS / sepsis / sulfonylurea-induced hypoglycemia considered because… ruled out because…"
- Regimen change, sick-day instructions, follow-up timing, return precautions
Safety-net & return precautions to give
- Return or call 911 for confusion, trouble waking up, vomiting, severe weakness, fast breathing, fruity breath, or another low blood sugar episode.
- Check glucose every 2–4 hours when sick. Do NOT stop basal insulin.
- Follow up with PCP/endocrinology in 24–72 hours.
Educational guidance for clinicians. Not a substitute for clinical judgment. Always individualize to the patient and your local resources.
Evidence sources
- · ADA Standards of Care 2025
- · Endocrine Society Hypoglycemia Guidelines
Review status
Last reviewed: 2026-04
Reviewed by the MyClinicianGuide editorial team. Cadence: annual.
Educational reference for licensed clinicians (NP, PA, MD, DO). Not a substitute for clinical judgment, institutional protocols, or specialty consultation. Apply in context of the full clinical picture, patient goals, and current standards of care. See About AI guidance for AI-related limitations.
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