ICD-10 Code E16.A3 – Hypoglycemia level 3 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E16.A3 – Hypoglycemia level 3
What it is
E16.A3 identifies hypoglycemia level 3, a severe low-blood-glucose event requiring immediate clinical attention. Use this code when the record clearly documents level 3 hypoglycemia.
Clinical signs
Clinical features vary; refer to documentation. Severe episodes may include altered mental status, inability to self-treat, or need for assistance from another person.
When to use this code
Use E16.A3 when the clinician documents hypoglycemia level 3, especially if the episode required urgent intervention or assistance. This code fits acute encounters, follow-up notes, or discharge summaries that specifically identify level 3 hypoglycemia. Check documentation if the severity level is unclear.
Do not use for
Do not use this code for unspecified hypoglycemia or milder episodes without level 3 documentation. If the record only states low glucose or symptoms without severity, check documentation.
Coding tip
Code the documented severity exactly as stated; do not assume level 3 from symptoms alone.