ICD-10 Code E13.01 – Other specified diabetes mellitus with hyperosmolarity with coma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E13.01 – Other specified diabetes mellitus with hyperosmolarity with coma
What it is
This code identifies a form of diabetes mellitus with severe hyperosmolarity and coma, when the diabetes type is classified as “other specified.” Use it when the record clearly links the coma to this hyperosmolar diabetic state.
Clinical signs
Clinical features vary; refer to documentation. Typical records describe altered mental status progressing to coma, severe dehydration, and hyperosmolar hyperglycemic state associated with diabetes.
When to use this code
Use E13.01 when the clinician documents other specified diabetes mellitus with hyperosmolarity and coma, or a hyperosmolar diabetic coma in a patient whose diabetes fits the “other specified” category. Make sure the note supports both hyperosmolarity and coma. If the diabetes type is not clearly specified, check documentation before assigning the code.
Do not use for
Do not use this code for diabetic hyperosmolarity without coma, or for diabetic coma not linked to hyperosmolarity. Check documentation if the record instead supports another diabetes category.
Coding tip
Verify that “other specified diabetes mellitus” is documented before choosing E13.01, because the diabetes category drives correct code selection.