ICD-10 Code E08.01 – Diabetes mellitus due to underlying condition with hyperosmolarity with coma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.01 – Diabetes mellitus due to underlying condition with hyperosmolarity with coma
What it is
This code identifies diabetes caused by another underlying condition, complicated by hyperosmolarity and coma. Use it when the record clearly links the diabetes to the other condition and documents coma.
Clinical signs
Typical findings include severe dehydration, altered mental status, and progression to coma in the setting of hyperosmolar hyperglycemic state. Clinical features vary; refer to documentation.
When to use this code
Use E08.01 when the provider documents diabetes due to another disease or condition and also documents hyperosmolarity with coma. The underlying cause should be stated in the chart, such as a secondary endocrine or pancreatic disorder. If coma is not documented, do not assign this code.
Do not use for
Do not use this code for type 1 or type 2 diabetes, or for hyperosmolarity without coma. If the diabetes is not documented as due to an underlying condition, check documentation.
Coding tip
Always code the underlying condition first when instructed, and confirm that coma is explicitly documented before assigning E08.01.