ICD-10 · PDGM grouping
K56 Paralytic ileus and intestinal obstruction without hernia
All 16 codes in the K56 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
16
Can lead a claim
13
Cannot lead a claim
3
What CMS assigns to K56
13 of the 16 codes group to MMTA - Gastrointestinal tract and Genitourinary system; 3 are assigned no clinical group. 8 of the 16 count toward the Intestinal Obstruction and Ileus comorbidity subgroup; 8 are assigned none. 13 of the 16 can lead a claim.
- Intestinal Obstruction and Ileus: can award the low comorbidity tier as a secondary diagnosis.
Every code in K56
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 |
|---|---|---|---|---|
| K56.0 | Paralytic ileus | Can lead a claim | J | Intestinal Obstruction and Ileus |
| K56.1 | Intussusception | Can lead a claim | J | None |
| K56.2 | Volvulus | Can lead a claim | J | None |
| K56.3 | Gallstone ileus | Can lead a claim | J | None |
| K56.4 Other impaction of intestine | ||||
| K56.41 | Fecal impaction | Can lead a claim | J | None |
| K56.49 | Other impaction of intestine | Can lead a claim | J | None |
| K56.5 Intestinal adhesions [bands] with obstruction (postinfection) | ||||
| K56.50 | Intestinal adhesions [bands], unspecified as to partial versus complete obstructionCMS: Intestnl adhesions, unsp as to partial versus complete obst | Can lead a claim | J | None |
| K56.51 | Intestinal adhesions [bands], with partial obstruction | Can lead a claim | J | None |
| K56.52 | Intestinal adhesions [bands] with complete obstruction | Can lead a claim | J | None |
| K56.6 Other and unspecified intestinal obstruction | ||||
| K56.60 Unspecified intestinal obstruction | ||||
| K56.600 | Partial intestinal obstruction, unspecified as to cause | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Intestinal Obstruction and Ileus |
| K56.601 | Complete intestinal obstruction, unspecified as to cause | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Intestinal Obstruction and Ileus |
| K56.609 | Unspecified intestinal obstruction, unspecified as to partial versus complete obstructionCMS: Unsp intestnl obst, unsp as to partial versus complete obst | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | Intestinal Obstruction and Ileus |
| K56.69 Other intestinal obstruction | ||||
| K56.690 | Other partial intestinal obstruction | Can lead a claim | J | Intestinal Obstruction and Ileus |
| K56.691 | Other complete intestinal obstruction | Can lead a claim | J | Intestinal Obstruction and Ileus |
| K56.699 | Other intestinal obstruction unspecified as to partial versus complete obstructionCMS: Other intestnl obst unsp as to partial versus complete obst | Can lead a claim | J | Intestinal Obstruction and Ileus |
| K56.7 | Ileus, unspecified | Can lead a claim | J | Intestinal Obstruction and Ileus |
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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