ICD-10 · PDGM grouping
K35 Acute appendicitis
All 13 codes in the K35 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
13
Can lead a claim
13
Cannot lead a claim
0
What CMS assigns to K35
All 13 codes group to MMTA - Gastrointestinal tract and Genitourinary system. None of the 13 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in K35
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 |
|---|---|---|---|---|
| K35.2 Acute appendicitis with generalized peritonitis | ||||
| K35.20 Acute appendicitis with generalized peritonitis, without abscess | ||||
| K35.200 | Acute appendicitis with generalized peritonitis, without perforation or abscessCMS: Acute appendicitis with gen peritonitis, w/o perf or abscs | Can lead a claim | J | None |
| K35.201 | Acute appendicitis with generalized peritonitis, with perforation, without abscessCMS: Ac appendicitis with gen peritonitis, with perf, w/o abscs | Can lead a claim | J | None |
| K35.209 | Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforationCMS: Ac appendicitis w gen peritonitis,w/o abscs,unsp as to perf | Can lead a claim | J | None |
| K35.21 Acute appendicitis with generalized peritonitis, with abscess | ||||
| K35.210 | Acute appendicitis with generalized peritonitis, without perforation, with abscessCMS: Ac appendicitis with gen peritonitis, w/o perf, with abscs | Can lead a claim | J | None |
| K35.211 | Acute appendicitis with generalized peritonitis, with perforation and abscessCMS: Acute appendicitis with gen peritonitis, with perf and abscs | Can lead a claim | J | None |
| K35.219 | Acute appendicitis with generalized peritonitis, with abscess, unspecified as to perforationCMS: Ac appendicitis w gen peritonitis, w abscs, unsp as to perf | Can lead a claim | J | None |
| K35.3 Acute appendicitis with localized peritonitis | ||||
| K35.30 | Acute appendicitis with localized peritonitis, without perforation or gangreneCMS: Acute appendicitis with loc peritonitis, w/o perf or gangr | Can lead a claim | J | None |
| K35.31 | Acute appendicitis with localized peritonitis and gangrene, without perforationCMS: Acute appendicitis with loc peritonitis and gangr, w/o perf | Can lead a claim | J | None |
| K35.32 | Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscessCMS: Ac appendicitis w perf, loc peritonitis, & gangr, w/o abscs | Can lead a claim | J | None |
| K35.33 | Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscessCMS: Ac appendicitis with perf, loc peritonitis, and gangr, wbscs | Can lead a claim | J | None |
| K35.8 Other and unspecified acute appendicitis | ||||
| K35.80 | Unspecified acute appendicitis | Can lead a claim | J | None |
| K35.89 Other acute appendicitis | ||||
| K35.890 | Other acute appendicitis without perforation or gangrene | Can lead a claim | J | None |
| K35.891 | Other acute appendicitis without perforation, with gangrene | 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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