ICD-10 Code E13.0 – Other specified diabetes mellitus with hyperosmolarity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E13.0 – Other specified diabetes mellitus with hyperosmolarity
What it is
This code identifies hyperosmolarity in a patient with other specified diabetes mellitus. Use it when the diabetes type is documented as other specified and the record shows a hyperosmolar state.
Clinical signs
Clinical features can include severe dehydration, marked thirst, confusion, and altered mental status. Clinical features vary; refer to documentation.
When to use this code
Use E13.0 when the provider documents other specified diabetes mellitus and also documents hyperosmolarity or a hyperosmolar state. This may appear in an acute admission, emergency visit, or problem list when the condition is clearly stated. Check documentation if the diabetes type is unclear.
Do not use for
Do not use this code for diabetes without hyperosmolarity, or when the record documents a different diabetes category. Do not assign it if hyperosmolarity is not stated or cannot be supported from the note.
Coding tip
Code the diabetes type and the hyperosmolar complication exactly as documented; if either element is missing, query the provider.