ICD-10 Code K13.22 – Minimal keratinized residual ridge mucosa (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K13.22 – Minimal keratinized residual ridge mucosa
What it is
K13.22 identifies minimal keratinized residual ridge mucosa, meaning the gum tissue over a residual ridge has little keratinized surface. Use it when documentation specifically describes this oral mucosal finding.
Clinical signs
Clinical features vary; refer to documentation. Notes may mention a thin, nonkeratinized, or poorly keratinized ridge mucosa, especially in edentulous areas. Diagnosis is usually based on oral examination.
When to use this code
Use K13.22 when the provider documents minimal keratinized residual ridge mucosa as a distinct finding. It may appear in dental or oral surgery records describing tissue quality, prosthetic planning, or mucosal evaluation. Code only when the term is stated clearly.
Do not use for
Do not use this code for general gingival recession, periodontal disease, or unspecified oral mucosal changes unless the record specifically identifies minimal keratinized residual ridge mucosa. Check documentation if the wording is unclear.
Coding tip
Look for the exact phrase “minimal keratinized residual ridge mucosa” or equivalent documentation before assigning K13.22.