ICD-10 Code K05.2 – Aggressive periodontitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.2 – Aggressive periodontitis
What it is
K05.2 identifies aggressive periodontitis, a rapidly progressing form of periodontal disease that affects the supporting tissues of the teeth. It is coded when documentation specifically describes this diagnosis.
Clinical signs
Typical findings include rapid attachment loss, deep periodontal pockets, and bone destruction that may appear out of proportion to visible plaque. Clinical features vary; refer to documentation.
When to use this code
Use K05.2 when the provider documents aggressive periodontitis, including localized or generalized disease patterns if not otherwise specified. It fits records describing rapid periodontal breakdown with early onset or unusually fast progression. Check documentation when the chart uses older terms or mixed periodontal diagnoses.
Do not use for
Do not use this code for gingivitis, chronic periodontitis, or nonspecific periodontal disease without an aggressive pattern. If the record does not clearly support aggressive periodontitis, check documentation.
Coding tip
Code K05.2 only when the diagnosis is explicitly stated; do not infer aggressiveness from severity alone.