ICD-10 · PDGM grouping
K55-K64 — Other diseases of intestines
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in range
157
No clinical group
5
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
134 of the 157 codes in K55-K64 group to MMTA - Gastrointestinal tract and Genitourinary system, but the range is not uniform — it spreads across 2 clinical groups. A further 5 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in K55-K64
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
- K55Vascular disorders of intestine27 codes
- K56Paralytic ileus and intestinal obstruction without hernia16 codes
- K57Diverticular disease of intestine24 codes
- K58Irritable bowel syndrome5 codes
- K59Other functional intestinal disorders14 codes
- K60Fissure and fistula of anal and rectal regions30 codes
- K61Abscess of anal and rectal regions7 codes
- K62Other diseases of anus and rectum12 codes
- K63Other diseases of intestine14 codes
- K64Hemorrhoids and perianal venous thrombosis8 codes
Every code in K55-K64
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| K55011 | Focal (segmental) acute ischemia of small intestine | A | Can lead a claim |
| K55012 | Diffuse acute (reversible) ischemia of small intestine | A | Can lead a claim |
| K55019 | Acute ischemia of small intestine, extent unspecified | J | Can lead a claim |
| K55021 | Focal (segmental) acute infarction of small intestine | A | Can lead a claim |
| K55022 | Diffuse acute infarction of small intestine | A | Can lead a claim |
| K55029 | Acute infarction of small intestine, extent unspecified | A | Can lead a claim |
| K55031 | Focal (segmental) acute ischemia of large intestine | J | Can lead a claim |
| K55032 | Diffuse acute (reversible) ischemia of large intestine | A | Can lead a claim |
| K55039 | Acute ischemia of large intestine, extent unspecified | J | Can lead a claim |
| K55041 | Focal (segmental) acute infarction of large intestine | A | Can lead a claim |
| K55042 | Diffuse acute infarction of large intestine | A | Can lead a claim |
| K55049 | Acute infarction of large intestine, extent unspecified | A | Can lead a claim |
| K55051 | Focal acute ischemia of intestine, part unspecified | A | Can lead a claim |
| K55052 | Diffuse acute ischemia of intestine, part unspecified | A | Can lead a claim |
| K55059 | Acute ischemia of intestine, part and extent unspecified | J | Can lead a claim |
| K55061 | Focal acute infarction of intestine, part unspecified | A | Can lead a claim |
| K55062 | Diffuse acute infarction of intestine, part unspecified | A | Can lead a claim |
| K55069 | Acute infarction of intestine, part and extent unspecified | J | Can lead a claim |
| K551 | Chronic vascular disorders of intestine | J | Can lead a claim |
| K5520 | Angiodysplasia of colon without hemorrhage | J | Can lead a claim |
| K5521 | Angiodysplasia of colon with hemorrhage | J | Can lead a claim |
| K5530 | Necrotizing enterocolitis, unspecified | A | Can lead a claim |
| K5531 | Stage 1 necrotizing enterocolitis | A | Can lead a claim |
| K5532 | Stage 2 necrotizing enterocolitis | A | Can lead a claim |
| K5533 | Stage 3 necrotizing enterocolitis | A | Can lead a claim |
| K558 | Other vascular disorders of intestine | J | Can lead a claim |
| K559 | Vascular disorder of intestine, unspecified | J | Can lead a claim |
| K560 | Paralytic ileus | J | Can lead a claim |
| K561 | Intussusception | J | Can lead a claim |
| K562 | Volvulus | J | Can lead a claim |
| K563 | Gallstone ileus | J | Can lead a claim |
| K5641 | Fecal impaction | J | Can lead a claim |
| K5649 | Other impaction of intestine | J | Can lead a claim |
| K5650 | Intestnl adhesions, unsp as to partial versus complete obst | J | Can lead a claim |
| K5651 | Intestinal adhesions [bands], with partial obstruction | J | Can lead a claim |
| K5652 | Intestinal adhesions [bands] with complete obstruction | J | Can lead a claim |
| K56600 | Partial intestinal obstruction, unspecified as to cause | None | Cannot lead a claim |
| K56601 | Complete intestinal obstruction, unspecified as to cause | None | Cannot lead a claim |
| K56609 | Unsp intestnl obst, unsp as to partial versus complete obst | None | Cannot lead a claim |
| K56690 | Other partial intestinal obstruction | J | Can lead a claim |
| K56691 | Other complete intestinal obstruction | J | Can lead a claim |
| K56699 | Other intestnl obst unsp as to partial versus complete obst | J | Can lead a claim |
| K567 | Ileus, unspecified | J | Can lead a claim |
| K5700 | Dvtrcli of sm int w perforation and abscess w/o bleeding | J | Can lead a claim |
| K5701 | Dvtrcli of sm int w perforation and abscess w bleeding | J | Can lead a claim |
| K5710 | Dvrtclos of sm int w/o perforation or abscess w/o bleeding | J | Can lead a claim |
| K5711 | Dvrtclos of sm int w/o perforation or abscess w bleeding | J | Can lead a claim |
| K5712 | Dvtrcli of sm int w/o perforation or abscess w/o bleeding | J | Can lead a claim |
| K5713 | Dvtrcli of sm int w/o perforation or abscess w bleeding | J | Can lead a claim |
| K5720 | Dvtrcli of lg int w perforation and abscess w/o bleeding | J | Can lead a claim |
| K5721 | Dvtrcli of lg int w perforation and abscess w bleeding | J | Can lead a claim |
| K5730 | Dvrtclos of lg int w/o perforation or abscess w/o bleeding | J | Can lead a claim |
| K5731 | Dvrtclos of lg int w/o perforation or abscess w bleeding | J | Can lead a claim |
| K5732 | Dvtrcli of lg int w/o perforation or abscess w/o bleeding | J | Can lead a claim |
| K5733 | Dvtrcli of lg int w/o perforation or abscess w bleeding | J | Can lead a claim |
| K5740 | Dvtrcli of both small and lg int w perf and abscs w/o bleed | J | Can lead a claim |
| K5741 | Dvtrcli of both small and lg int w perf and abscess w bleed | J | Can lead a claim |
| K5750 | Dvrtclos of both sm and lg int w/o perf or abscs w/o bleed | J | Can lead a claim |
| K5751 | Dvrtclos of both small and lg int w/o perf or abscs w bleed | J | Can lead a claim |
| K5752 | Dvtrcli of both small and lg int w/o perf or abscs w/o bleed | J | Can lead a claim |
| K5753 | Dvtrcli of both small and lg int w/o perf or abscess w bleed | J | Can lead a claim |
| K5780 | Dvtrcli of intest, part unsp, w perf and abscess w/o bleed | J | Can lead a claim |
| K5781 | Dvtrcli of intest, part unsp, w perf and abscess w bleeding | J | Can lead a claim |
| K5790 | Dvrtclos of intest, part unsp, w/o perf or abscess w/o bleed | J | Can lead a claim |
| K5791 | Dvrtclos of intest, part unsp, w/o perf or abscess w bleed | J | Can lead a claim |
| K5792 | Dvtrcli of intest, part unsp, w/o perf or abscess w/o bleed | J | Can lead a claim |
| K5793 | Dvtrcli of intest, part unsp, w/o perf or abscess w bleeding | J | Can lead a claim |
| K580 | Irritable bowel syndrome with diarrhea | J | Can lead a claim |
| K581 | Irritable bowel syndrome with constipation | J | Can lead a claim |
| K582 | Mixed irritable bowel syndrome | J | Can lead a claim |
| K588 | Other irritable bowel syndrome | J | Can lead a claim |
| K589 | Irritable bowel syndrome, unspecified | J | Can lead a claim |
| K5900 | Constipation, unspecified | J | Can lead a claim |
| K5901 | Slow transit constipation | J | Can lead a claim |
| K5902 | Outlet dysfunction constipation | J | Can lead a claim |
| K5903 | Drug induced constipation | J | Can lead a claim |
| K5904 | Chronic idiopathic constipation | J | Can lead a claim |
| K5909 | Other constipation | J | Can lead a claim |
| K591 | Functional diarrhea | J | Can lead a claim |
| K592 | Neurogenic bowel, not elsewhere classified | J | Can lead a claim |
| K5931 | Toxic megacolon | J | Can lead a claim, code first applies |
| K5939 | Other megacolon | J | Can lead a claim, code first applies |
| K594 | Anal spasm | J | Can lead a claim |
| K5981 | Ogilvie syndrome | J | Can lead a claim |
| K5989 | Other specified functional intestinal disorders | J | Can lead a claim |
| K599 | Functional intestinal disorder, unspecified | J | Can lead a claim |
| K600 | Acute anal fissure | J | Can lead a claim |
| K601 | Chronic anal fissure | J | Can lead a claim |
| K602 | Anal fissure, unspecified | J | Can lead a claim |
| K6030 | Anal fistula, unspecified | J | Can lead a claim, code first applies |
| K60311 | Anal fistula, simple, initial | J | Can lead a claim, code first applies |
| K60312 | Anal fistula, simple, persistent | J | Can lead a claim, code first applies |
| K60313 | Anal fistula, simple, recurrent | J | Can lead a claim, code first applies |
| K60319 | Anal fistula, simple, unspecified | J | Can lead a claim, code first applies |
| K60321 | Anal fistula, complex, initial | J | Can lead a claim, code first applies |
| K60322 | Anal fistula, complex, persistent | J | Can lead a claim, code first applies |
| K60323 | Anal fistula, complex, recurrent | J | Can lead a claim, code first applies |
| K60329 | Anal fistula, complex, unspecified | J | Can lead a claim, code first applies |
| K6040 | Rectal fistula, unspecified | J | Can lead a claim, code first applies |
| K60411 | Rectal fistula, simple, initial | J | Can lead a claim, code first applies |
| K60412 | Rectal fistula, simple, persistent | J | Can lead a claim, code first applies |
| K60413 | Rectal fistula, simple, recurrent | J | Can lead a claim, code first applies |
| K60419 | Rectal fistula, simple, unspecified | J | Can lead a claim, code first applies |
| K60421 | Rectal fistula, complex, initial | J | Can lead a claim, code first applies |
| K60422 | Rectal fistula, complex, persistent | J | Can lead a claim, code first applies |
| K60423 | Rectal fistula, complex, recurrent | J | Can lead a claim, code first applies |
| K60429 | Rectal fistula, complex, unspecified | J | Can lead a claim, code first applies |
| K6050 | Anorectal fistula, unspecified | J | Can lead a claim, code first applies |
| K60511 | Anorectal fistula, simple, initial | J | Can lead a claim, code first applies |
| K60512 | Anorectal fistula, simple, persistent | J | Can lead a claim, code first applies |
| K60513 | Anorectal fistula, simple, recurrent | J | Can lead a claim, code first applies |
| K60519 | Anorectal fistula, simple, unspecified | J | Can lead a claim, code first applies |
| K60521 | Anorectal fistula, complex, initial | J | Can lead a claim, code first applies |
| K60522 | Anorectal fistula, complex, persistent | J | Can lead a claim, code first applies |
| K60523 | Anorectal fistula, complex, recurrent | J | Can lead a claim, code first applies |
| K60529 | Anorectal fistula, complex, unspecified | J | Can lead a claim, code first applies |
| K610 | Anal abscess | J | Can lead a claim |
| K611 | Rectal abscess | J | Can lead a claim |
| K612 | Anorectal abscess | J | Can lead a claim |
| K6131 | Horseshoe abscess | J | Can lead a claim |
| K6139 | Other ischiorectal abscess | J | Can lead a claim |
| K614 | Intrasphincteric abscess | J | Can lead a claim |
| K615 | Supralevator abscess | J | Can lead a claim |
| K620 | Anal polyp | J | Can lead a claim |
| K621 | Rectal polyp | J | Can lead a claim |
| K622 | Anal prolapse | J | Can lead a claim |
| K623 | Rectal prolapse | J | Can lead a claim |
| K624 | Stenosis of anus and rectum | J | Can lead a claim |
| K625 | Hemorrhage of anus and rectum | J | Can lead a claim |
| K626 | Ulcer of anus and rectum | J | Can lead a claim |
| K627 | Radiation proctitis | J | Can lead a claim |
| K6281 | Anal sphincter tear (healed) (nontraumatic) (old) | A | Can lead a claim |
| K6282 | Dysplasia of anus | J | Can lead a claim |
| K6289 | Other specified diseases of anus and rectum | J | Can lead a claim |
| K629 | Disease of anus and rectum, unspecified | None | Cannot lead a claim |
| K630 | Abscess of intestine | J | Can lead a claim |
| K631 | Perforation of intestine (nontraumatic) | J | Can lead a claim |
| K632 | Fistula of intestine | J | Can lead a claim |
| K633 | Ulcer of intestine | J | Can lead a claim |
| K634 | Enteroptosis | J | Can lead a claim |
| K635 | Polyp of colon | J | Can lead a claim |
| K6381 | Dieulafoy lesion of intestine | J | Can lead a claim |
| K638211 | Small intestinal bacterial overgrowth, hydrogen-subtype | J | Can lead a claim |
| K638212 | Small intestnl bact overgrowth, hydrogen sulfide-subtype | J | Can lead a claim |
| K638219 | Small intestinal bacterial overgrowth, unspecified | J | Can lead a claim |
| K63822 | Small intestinal fungal overgrowth | J | Can lead a claim |
| K63829 | Intestinal methanogen overgrowth, unspecified | J | Can lead a claim |
| K6389 | Other specified diseases of intestine | J | Can lead a claim |
| K639 | Disease of intestine, unspecified | None | Cannot lead a claim |
| K640 | First degree hemorrhoids | J | Can lead a claim |
| K641 | Second degree hemorrhoids | J | Can lead a claim |
| K642 | Third degree hemorrhoids | J | Can lead a claim |
| K643 | Fourth degree hemorrhoids | J | Can lead a claim |
| K644 | Residual hemorrhoidal skin tags | J | Can lead a claim |
| K645 | Perianal venous thrombosis | J | Can lead a claim |
| K648 | Other hemorrhoids | J | Can lead a claim |
| K649 | Unspecified hemorrhoids | J | Can lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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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