ICD-10 · PDGM grouping
K52 Other and unspecified noninfective gastroenteritis and colitis
All 14 codes in the K52 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
14
Can lead a claim
14
Cannot lead a claim
0
What CMS assigns to K52
All 14 codes group to MMTA - Gastrointestinal tract and Genitourinary system (11) and MMTA - Other (3). None of the 14 is assigned a comorbidity subgroup. Every code can lead a claim. CMS attaches a code-first note to 1 of the 14.
Code first
CMS grouper convention 8, on K52.1. Code first:
- , if applicable, toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
Every code in K52
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 |
|---|---|---|---|---|
| K52.0 | Gastroenteritis and colitis due to radiation | Can lead a claim | J | None |
| K52.1 | Toxic gastroenteritis and colitis | Can lead a claim, code first applies | J | None |
| K52.2 Allergic and dietetic gastroenteritis and colitis | ||||
| K52.21 | Food protein-induced enterocolitis syndrome | Can lead a claim | A | None |
| K52.22 | Food protein-induced enteropathy | Can lead a claim | A | None |
| K52.29 | Other allergic and dietetic gastroenteritis and colitis | Can lead a claim | J | None |
| K52.3 | Indeterminate colitis | Can lead a claim | J | None |
| K52.8 Other specified noninfective gastroenteritis and colitis | ||||
| K52.81 | Eosinophilic gastritis or gastroenteritis | Can lead a claim | J | None |
| K52.82 | Eosinophilic colitis | Can lead a claim | J | None |
| K52.83 Microscopic colitis | ||||
| K52.831 | Collagenous colitis | Can lead a claim | J | None |
| K52.832 | Lymphocytic colitis | Can lead a claim | J | None |
| K52.838 | Other microscopic colitis | Can lead a claim | A | None |
| K52.839 | Microscopic colitis, unspecified | Can lead a claim | J | None |
| K52.89 | Other specified noninfective gastroenteritis and colitis | Can lead a claim | J | None |
| K52.9 | Noninfective gastroenteritis and colitis, unspecified | Can lead a claim | J | 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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