ICD-10 · PDGM grouping
K27 Peptic ulcer, site unspecified
All 9 codes in the K27 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
9
Can lead a claim
9
Cannot lead a claim
0
What CMS assigns to K27
All 9 codes group to MMTA - Gastrointestinal tract and Genitourinary system. None of the 9 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in K27
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 |
|---|---|---|---|---|
| K27.0 | Acute peptic ulcer, site unspecified, with hemorrhage | Can lead a claim | J | None |
| K27.1 | Acute peptic ulcer, site unspecified, with perforation | Can lead a claim | J | None |
| K27.2 | Acute peptic ulcer, site unspecified, with both hemorrhage and perforationCMS: Acute peptic ulcer, site unsp, w both hemorrhage and perf | Can lead a claim | J | None |
| K27.3 | Acute peptic ulcer, site unspecified, without hemorrhage or perforationCMS: Acute peptic ulcer, site unsp, w/o hemorrhage or perforation | Can lead a claim | J | None |
| K27.4 | Chronic or unspecified peptic ulcer, site unspecified, with hemorrhageCMS: Chronic or unsp peptic ulcer, site unsp, with hemorrhage | Can lead a claim | J | None |
| K27.5 | Chronic or unspecified peptic ulcer, site unspecified, with perforationCMS: Chronic or unsp peptic ulcer, site unsp, with perforation | Can lead a claim | J | None |
| K27.6 | Chronic or unspecified peptic ulcer, site unspecified, with both hemorrhage and perforationCMS: Chr or unsp peptic ulcer, site unsp, w both hemor and perf | Can lead a claim | J | None |
| K27.7 | Chronic peptic ulcer, site unspecified, without hemorrhage or perforationCMS: Chronic peptic ulcer, site unsp, w/o hemorrhage or perf | Can lead a claim | J | None |
| K27.9 | Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforationCMS: Peptic ulc, site unsp, unsp as ac or chr, w/o hemor or perf | 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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