ICD-10 Code E13.1 – Other specified diabetes mellitus with ketoacidosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E13.1 – Other specified diabetes mellitus with ketoacidosis
What it is
This code identifies ketoacidosis occurring in a form of diabetes that is not type 1 or type 2 and is otherwise specified. Use it when the record clearly links the ketoacidosis to that specific diabetes category.
Clinical signs
Clinical features vary; refer to documentation. Typical ketoacidosis findings include dehydration, nausea or vomiting, abdominal pain, rapid breathing, and altered mental status, but the diagnosis must be supported by the provider’s assessment.
When to use this code
Use E13.1 when the chart documents other specified diabetes mellitus with ketoacidosis, such as diabetes due to an underlying condition or another specified form. Code only when the provider explicitly connects the ketoacidosis to that diabetes type. Check documentation if the diabetes category is unclear.
Do not use for
Do not use this code for type 1 or type 2 diabetes with ketoacidosis, or when ketoacidosis is documented without a specified diabetes type. If the record does not identify the diabetes category, check documentation.
Coding tip
Verify the exact diabetes type and the provider’s link between diabetes and ketoacidosis before assigning E13.1.