ICD-10 Code E08.630 – Diabetes mellitus due to underlying condition with periodontal disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E08.630 – Diabetes mellitus due to underlying condition with periodontal disease
What it is
This code identifies diabetes mellitus caused by another underlying condition when periodontal disease is also present. Use it when the record shows both the secondary diabetes and the gum disease relationship.
Clinical signs
Clinical features vary; refer to documentation. Periodontal disease may be documented as gingival inflammation, periodontal pocketing, attachment loss, or other dentist-confirmed periodontal findings.
When to use this code
Use E08.630 when the provider documents diabetes due to an underlying condition and specifically links periodontal disease to that diabetes diagnosis. The chart should support both conditions. If the underlying cause of diabetes is not stated, check documentation before coding.
Do not use for
Do not use this code for diabetes not caused by another condition, or for periodontal disease without documented secondary diabetes. Do not assume the causal relationship; check documentation.
Coding tip
Verify that the record states “due to underlying condition” and separately documents periodontal disease before assigning E08.630.