ICD-10 Code E10.649 – Type 1 diabetes mellitus with hypoglycemia without coma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E10.649 – Type 1 diabetes mellitus with hypoglycemia without coma
What it is
This code identifies type 1 diabetes mellitus complicated by hypoglycemia, but the patient is not in coma. Use it when documentation links low blood glucose to type 1 diabetes and no diabetic coma is present.
Clinical signs
Typical features of hypoglycemia may include sweating, tremor, hunger, confusion, irritability, or weakness. Clinical features vary; refer to documentation, and confirm that the low glucose episode is associated with type 1 diabetes.
When to use this code
Use this code when the record documents type 1 diabetes and a hypoglycemic episode without coma. It may apply to outpatient, emergency, or inpatient encounters when the provider states hypoglycemia as a diabetic complication. If the note only says “low blood sugar,” check documentation for the diabetes link.
Do not use for
Do not use it for hypoglycemia without documented diabetes, or when the patient has diabetic coma. If the chart specifies another diabetes type or an unspecified diabetes complication, code that documented condition instead.
Coding tip
Verify both elements in the note: type 1 diabetes and hypoglycemia without coma.