ICD-10 Code E08.11 – Diabetes mellitus due to underlying condition with ketoacidosis with coma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.11 – Diabetes mellitus due to underlying condition with ketoacidosis with coma
What it is
This code identifies diabetes caused by another underlying condition, with diabetic ketoacidosis and coma. Use it when the record shows both ketoacidosis and coma linked to secondary diabetes.
Clinical signs
Clinical features vary; refer to documentation. Coma, severe altered mental status, and signs of diabetic ketoacidosis may be documented, along with the underlying condition causing the diabetes.
When to use this code
Use E08.11 when the provider documents diabetes due to another condition and clearly states ketoacidosis with coma. The chart should connect the diabetes to the underlying cause and the acute metabolic complication.
If the record mentions ketoacidosis without coma, or coma without ketoacidosis, choose the more specific documented code. Check documentation for the exact diabetes type and complication.
Do not use for
Do not use this code for type 1 or type 2 diabetes unless the record specifically states diabetes due to an underlying condition. Do not assign it when coma is absent.
Coding tip
Verify that the underlying condition is documented and that both ketoacidosis and coma are explicitly linked to the diabetes.