ICD-10 Code E08 – Diabetes mellitus due to underlying condition (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08 – Diabetes mellitus due to underlying condition
What it is
This code identifies diabetes that is caused by another underlying condition, such as a disease or disorder affecting the pancreas or hormones. Use it when the documentation clearly links the diabetes to that underlying condition.
Clinical signs
Clinical features vary; refer to documentation. Patients may show typical diabetes findings, but the key point is that the record supports a causal relationship to the underlying condition.
When to use this code
Use E08 when the provider documents diabetes as secondary to another condition, not as primary type 1 or type 2 diabetes. You should also code the underlying condition and any associated complications when documented. If the cause is unclear, check documentation.
Do not use for
Do not use this code for routine type 1 or type 2 diabetes without an underlying cause. Do not assign it if the record does not establish that the diabetes is due to another condition.
Coding tip
Verify the causal wording in the chart and code the underlying condition first when instructed by the Official Guidelines.