ICD-10-CM 2027
ICD-10 code for periodontitis
From the official ICD-10-CM alphabetic index entry “Periodontitis (chronic) (complex) (compound) (local) (simplex)”. Page updated September 29, 2026.
About coding periodontitis
The ICD-10-CM code for periodontitis is K05.30 (Chronic periodontitis, unspecified). The official index lists 28 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K05.30.
Within K05.3, choose K05.30 (unspecified) only when documentation doesn't support a more specific option: localized (K05.31) and generalized (K05.32).
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 periodontitis codes (official index)
- acute K05.20 — Aggressive periodontitis, unspecified
- 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
- aggressive K05.20 — Aggressive periodontitis, unspecified
- 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
- apical K04.5 — Chronic apical periodontitis
- acute (pulpal origin) K04.4 — Acute apical periodontitis of pulpal origin
- generalized K05.329 — Chronic periodontitis, generalized, unspecified severity
- moderate K05.322 — Chronic periodontitis, generalized, moderate
- severe K05.323 — Chronic periodontitis, generalized, severe
- slight K05.321 — Chronic periodontitis, generalized, slight
- localized K05.319 — Chronic periodontitis, localized, unspecified severity
- moderate K05.312 — Chronic periodontitis, localized, moderate
- severe K05.313 — Chronic periodontitis, localized, severe
- slight K05.311 — Chronic periodontitis, localized, slight
Common questions about periodontitis ICD-10 codes
What is the ICD-10 code for periodontitis?
- K05.30 — Chronic periodontitis, unspecified. More specific codes apply when the documentation supports them: K05.20, K05.229, K05.222, K05.223 and others below.
What is the ICD-10 code for acute periodontitis?
- K05.20 — Aggressive periodontitis, unspecified.
What is the ICD-10 code for aggressive periodontitis?
- K05.20 — Aggressive periodontitis, unspecified.
What is the ICD-10 code for apical periodontitis?
- K04.5 — Chronic apical periodontitis.
What is the ICD-10 code for generalized periodontitis?
- K05.329 — Chronic periodontitis, generalized, unspecified severity.
What is the ICD-10 code for localized periodontitis?
- K05.319 — Chronic periodontitis, localized, unspecified severity.
Is K05.30 billable?
- Yes. K05.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K05.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K05.30 as a principal diagnosis.
Is K05.30 a CC or MCC?
- No. K05.30 is neither a CC nor an MCC under MS-DRG v44.0.