ICD-10 · PDGM grouping
K05 Gingivitis and periodontal diseases
All 25 codes in the K05 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
25
Can lead a claim
0
Cannot lead a claim
25
What CMS assigns to K05
None of the 25 codes is assigned a clinical group. None of the 25 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to 2 of the 25.
Code first
CMS grouper convention 98, on K05.10, K05.11. Code first:
- , if applicable, diseases of the digestive system complicating pregnancy (O99.61-)
Every code in K05
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| K05.0 Acute gingivitis | ||||
| K05.00 | Acute gingivitis, plaque induced | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.01 | Acute gingivitis, non-plaque induced | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.1 Chronic gingivitis | ||||
| K05.10 | Chronic gingivitis, plaque induced | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.11 | Chronic gingivitis, non-plaque induced | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.2 Aggressive periodontitis | ||||
| K05.20 | Aggressive periodontitis, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.21 Aggressive periodontitis, localized | ||||
| K05.211 | Aggressive periodontitis, localized, slight | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.212 | Aggressive periodontitis, localized, moderate | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.213 | Aggressive periodontitis, localized, severe | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.219 | Aggressive periodontitis, localized, unspecified severity | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.22 Aggressive periodontitis, generalized | ||||
| K05.221 | Aggressive periodontitis, generalized, slight | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.222 | Aggressive periodontitis, generalized, moderate | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.223 | Aggressive periodontitis, generalized, severe | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.229 | Aggressive periodontitis, generalized, unspecified severity | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.3 Chronic periodontitis | ||||
| K05.30 | Chronic periodontitis, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.31 Chronic periodontitis, localized | ||||
| K05.311 | Chronic periodontitis, localized, slight | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.312 | Chronic periodontitis, localized, moderate | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.313 | Chronic periodontitis, localized, severe | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.319 | Chronic periodontitis, localized, unspecified severity | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.32 Chronic periodontitis, generalized | ||||
| K05.321 | Chronic periodontitis, generalized, slight | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.322 | Chronic periodontitis, generalized, moderate | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.323 | Chronic periodontitis, generalized, severe | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.329 | Chronic periodontitis, generalized, unspecified severity | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.4 | Periodontosis | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.5 | Other periodontal diseases | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| K05.6 | Periodontal disease, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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