ICD-10-CM 2027
ICD-10 code for periodontal disease
From the official ICD-10-CM alphabetic index entry “Disease, diseased › periodontal”. Page updated September 29, 2026.
About coding periodontal disease
The ICD-10-CM code for periodontal disease is K05.6 (Periodontal disease, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on K05.6.
Within K05, choose K05.6 (Periodontal disease, unspecified) only when documentation doesn't support a more specific option: acute gingivitis (K05.0), chronic gingivitis (K05.1), aggressive periodontitis (K05.2), chronic periodontitis (K05.3), Periodontosis (K05.4) and other periodontal diseases (K05.5).
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 periodontal disease codes (official index)
- specified NEC K05.5 — Other periodontal diseases
Common questions about periodontal disease ICD-10 codes
What is the ICD-10 code for periodontal disease?
- K05.6 — Periodontal disease, unspecified. More specific codes apply when the documentation supports them: K05.5.
Is K05.6 billable?
- Yes. K05.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K05.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K05.6 as a principal diagnosis.
Is K05.6 a CC or MCC?
- No. K05.6 is neither a CC nor an MCC under MS-DRG v44.0.