ICD-10 Code E11.00 – Type 2 diabetes mellitus with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E11.00 – Type 2 diabetes mellitus with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC)
What it is
This code identifies type 2 diabetes mellitus complicated by hyperosmolarity, but without documented nonketotic hyperglycemic-hyperosmolar coma. Use it when the record shows a hyperosmolar diabetic state and no coma is present.
Clinical signs
Clinical features may include marked dehydration, altered mental status, and signs of severe hyperglycemia. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents type 2 diabetes with hyperosmolarity and specifically states that coma is absent. It may appear in emergency, inpatient, or discharge documentation for a hyperosmolar diabetic episode. Verify that the note supports the diagnosis and does not describe coma.
Do not use for
Do not use it if the record documents hyperosmolar nonketotic hyperglycemic coma or another diabetic crisis without hyperosmolarity. Check documentation if the type of diabetes or presence of coma is unclear.
Coding tip
Confirm both the diabetes type and the absence of coma before assigning E11.00.