ICD-10 Code K05.221 – Aggressive periodontitis, generalized, slight (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.221 – Aggressive periodontitis, generalized, slight
What it is
K05.221 identifies generalized aggressive periodontitis with slight severity. Use it for rapid, destructive periodontal disease affecting multiple teeth, when documentation specifies the generalized pattern and mild extent.
Clinical signs
Typical findings include periodontal attachment loss, pocketing, and bone loss involving many teeth. Clinical features vary; refer to documentation for the generalized distribution and slight severity.
When to use this code
Use this code when the record clearly documents generalized aggressive periodontitis and also states the condition is slight. It fits periodontal evaluations, specialist notes, and problem lists that distinguish this subtype from chronic or localized disease.
Code it only when the provider identifies both the aggressive form and the generalized pattern. If the chart does not specify severity or distribution, check documentation before assigning K05.221.
Do not use for
Do not use this code for chronic periodontitis, localized aggressive periodontitis, or unspecified periodontal disease. If the note is unclear, Check documentation.
Coding tip
Match all three elements—aggressive, generalized, and slight—before assigning K05.221.