ICD-10 · PDGM grouping
K81 Cholecystitis
All 4 codes in the K81 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
4
Can lead a claim
4
Cannot lead a claim
0
What CMS assigns to K81
All 4 codes group to MMTA - Gastrointestinal tract and Genitourinary system. 3 of the 4 count toward the Pancreatitis, Cholelithiasis and Cholecystitis comorbidity subgroup; 1 is assigned none. Every code can lead a claim.
- Pancreatitis, Cholelithiasis and Cholecystitis
Every code in K81
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 |
|---|---|---|---|---|
| K81.0 | Acute cholecystitis | Can lead a claim | J | None |
| K81.1 | Chronic cholecystitis | Can lead a claim | J | Pancreatitis, Cholelithiasis and Cholecystitis |
| K81.2 | Acute cholecystitis with chronic cholecystitis | Can lead a claim | J | Pancreatitis, Cholelithiasis and Cholecystitis |
| K81.9 | Cholecystitis, unspecified | Can lead a claim | J | Pancreatitis, Cholelithiasis and Cholecystitis |
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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