ICD-10 · PDGM grouping
K40 Inguinal hernia
All 12 codes in the K40 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
12
Can lead a claim
12
Cannot lead a claim
0
What CMS assigns to K40
All 12 codes group to MMTA - Gastrointestinal tract and Genitourinary system (9) and MMTA - Other (3). None of the 12 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in K40
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 |
|---|---|---|---|---|
| K40.0 Bilateral inguinal hernia, with obstruction, without gangrene | ||||
| K40.00 | Bilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrentCMS: Bi inguinal hernia, w obst, w/o gangrene, not spcf as recur | Can lead a claim | J | None |
| K40.01 | Bilateral inguinal hernia, with obstruction, without gangrene, recurrentCMS: Bilateral inguinal hernia, w obst, w/o gangrene, recurrent | Can lead a claim | J | None |
| K40.1 Bilateral inguinal hernia, with gangrene | ||||
| K40.10 | Bilateral inguinal hernia, with gangrene, not specified as recurrentCMS: Bi inguinal hernia, w gangrene, not specified as recurrent | Can lead a claim | A | None |
| K40.11 | Bilateral inguinal hernia, with gangrene, recurrent | Can lead a claim | A | None |
| K40.2 Bilateral inguinal hernia, without obstruction or gangrene | ||||
| K40.20 | Bilateral inguinal hernia, without obstruction or gangrene, not specified as recurrentCMS: Bi inguinal hernia, w/o obst or gangrene, not spcf as recur | Can lead a claim | J | None |
| K40.21 | Bilateral inguinal hernia, without obstruction or gangrene, recurrentCMS: Bilateral inguinal hernia, w/o obst or gangrene, recurrent | Can lead a claim | J | None |
| K40.3 Unilateral inguinal hernia, with obstruction, without gangrene | ||||
| K40.30 | Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrentCMS: Unil inguinal hernia, w obst, w/o gangr, not spcf as recur | Can lead a claim | J | None |
| K40.31 | Unilateral inguinal hernia, with obstruction, without gangrene, recurrentCMS: Unilateral inguinal hernia, w obst, w/o gangrene, recurrent | Can lead a claim | J | None |
| K40.4 Unilateral inguinal hernia, with gangrene | ||||
| K40.40 | Unilateral inguinal hernia, with gangrene, not specified as recurrentCMS: Unil inguinal hernia, w gangrene, not specified as recurrent | Can lead a claim | J | None |
| K40.41 | Unilateral inguinal hernia, with gangrene, recurrent | Can lead a claim | A | None |
| K40.9 Unilateral inguinal hernia, without obstruction or gangrene | ||||
| K40.90 | Unilateral inguinal hernia, without obstruction or gangrene, not specified as recurrentCMS: Unil inguinal hernia, w/o obst or gangr, not spcf as recur | Can lead a claim | J | None |
| K40.91 | Unilateral inguinal hernia, without obstruction or gangrene, recurrentCMS: Unilateral inguinal hernia, w/o obst or gangrene, recurrent | 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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