ICD-10-CM 2027
ICD-10 code for aggressive periodontitis
From the official ICD-10-CM alphabetic index entry “Periodontitis (chronic) (complex) (compound) (local) (simplex) › aggressive”. Page updated September 29, 2026.
About coding aggressive periodontitis
The ICD-10-CM code for aggressive periodontitis is K05.20 (Aggressive periodontitis, unspecified). The official index lists 8 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K05.20.
Within K05.2, choose K05.20 (unspecified) only when documentation doesn't support a more specific option: localized (K05.21) and generalized (K05.22).
Use an additional code to identify: alcohol abuse and dependence (F10.-), exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific aggressive periodontitis codes (official index)
- generalized K05.229 — Aggressive periodontitis, generalized, unspecified severity
- moderate K05.222 — Aggressive periodontitis, generalized, moderate
- severe K05.223 — Aggressive periodontitis, generalized, severe
- slight K05.221 — Aggressive periodontitis, generalized, slight
- localized K05.219 — Aggressive periodontitis, localized, unspecified severity
- moderate K05.212 — Aggressive periodontitis, localized, moderate
- severe K05.213 — Aggressive periodontitis, localized, severe
- slight K05.211 — Aggressive periodontitis, localized, slight
Common questions about aggressive periodontitis ICD-10 codes
What is the ICD-10 code for aggressive periodontitis?
- K05.20 — Aggressive periodontitis, unspecified. More specific codes apply when the documentation supports them: K05.229, K05.222, K05.223, K05.221 and others below.
What is the ICD-10 code for generalized aggressive periodontitis?
- K05.229 — Aggressive periodontitis, generalized, unspecified severity.
What is the ICD-10 code for localized aggressive periodontitis?
- K05.219 — Aggressive periodontitis, localized, unspecified severity.
Is K05.20 billable?
- Yes. K05.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K05.20 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K05.20 as a principal diagnosis.
Is K05.20 a CC or MCC?
- No. K05.20 is neither a CC nor an MCC under MS-DRG v44.0.