ICD-10 Code E08.638 – Diabetes mellitus due to underlying condition with other oral complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.638 – Diabetes mellitus due to underlying condition with other oral complications
What it is
This code identifies diabetes caused by another underlying condition, with oral complications not otherwise classified. Use it when the record links the diabetes to a separate disease and documents a mouth-related complication.
Clinical signs
Clinical features vary; refer to documentation. Oral findings may include dental or periodontal problems, mucosal changes, or other mouth complications attributed to diabetes.
When to use this code
Use E08.638 when the provider states the diabetes is due to another condition and also documents an oral complication. Code the underlying condition first, when required by the record and coding guidelines. Check documentation for the specific oral problem if it is named.
Do not use for
Do not use this code for diabetes without a documented oral complication, or when the diabetes is not linked to an underlying condition. Check documentation if the mouth condition is unrelated to diabetes.
Coding tip
Verify both the causal link to the underlying disease and the oral complication before assigning E08.638.