ICD-10 Code E08.1 – Diabetes mellitus due to underlying condition with ketoacidosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.1 – Diabetes mellitus due to underlying condition with ketoacidosis
What it is
E08.1 identifies diabetes caused by another underlying condition when ketoacidosis is present. Use it when the record links the diabetes to a specific cause and documents ketoacidosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the chart shows diabetes with evidence of ketoacidosis, such as acute metabolic decompensation, and an underlying condition responsible for the diabetes.
When to use this code
Use E08.1 when the clinician documents diabetes secondary to another disease and specifically notes ketoacidosis. The underlying condition should be documented, and you may need additional codes for it. If the record does not clearly connect the diabetes to the cause, check documentation.
Do not use for
Do not use this code for type 1 or type 2 diabetes with ketoacidosis. Do not use it when ketoacidosis is absent or when the diabetes is not documented as due to an underlying condition.
Coding tip
Always code the underlying condition first when the documentation supports secondary diabetes.