ICD-10 Code E13.65 – Other specified diabetes mellitus with hyperglycemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E13.65 – Other specified diabetes mellitus with hyperglycemia
What it is
This code identifies diabetes mellitus that does not fit the usual type 1 or type 2 categories and is documented with hyperglycemia. Use it when the record specifies another form of diabetes and elevated blood glucose.
Clinical signs
Clinical features vary; refer to documentation. You may see symptoms or findings consistent with high blood sugar, but the record should clearly support both the diabetes type and the hyperglycemic state.
When to use this code
Use E13.65 when the provider documents a diagnosis of other specified diabetes mellitus and also states hyperglycemia. This applies to encounters where the elevated glucose is part of the assessed condition, not just a lab abnormality. Check documentation if the diabetes type is unclear.
Do not use for
Do not assign this code for unspecified diabetes, type 1, or type 2 diabetes unless the record supports “other specified” diabetes. Do not use it when hyperglycemia is not documented or is better explained by another condition.
Coding tip
Code the diabetes type exactly as documented, and confirm that hyperglycemia is explicitly linked in the assessment.