ICD-10 Code K08.21 – Minimal atrophy of the mandible (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K08.21 – Minimal atrophy of the mandible
What it is
This code identifies a mild decrease in the size or density of the lower jawbone. Use it when documentation specifically states minimal mandibular atrophy or an equivalent description.
Clinical signs
Clinical features vary; refer to documentation. Findings may include reduced mandibular bone volume noted on exam or imaging, often without major structural loss or severe functional impairment.
When to use this code
Use K08.21 when the clinician documents minimal atrophy of the mandible as the diagnosis. It may appear in dental, oral surgery, or maxillofacial records when bone loss is described as mild. If the record only mentions jaw changes without severity, check documentation.
Do not use for
Do not use this code for generalized tooth loss, routine edentulism, or unspecified jaw abnormalities. If the chart describes moderate or severe mandibular atrophy, confirm the correct code instead.
Coding tip
Code only when the provider clearly documents minimal mandibular atrophy; otherwise, query for severity and exact anatomic site.