ICD-10-CM 2023: K60-K69
| รหัส | คำอธิบาย |
| K60 | Fissure and fistula of anal and rectal regions |
| K60.0 | Acute anal fissure |
| K60.1 | Chronic anal fissure |
| K60.2 | Anal fissure, unspecified |
| K60.3 | Anal fistula |
| K60.4 | Rectal fistula |
| K60.5 | Anorectal fistula |
| K61 | Abscess of anal and rectal regions |
| K61.0 | Anal abscess |
| K61.1 | Rectal abscess |
| K61.2 | Anorectal abscess |
| K61.3 | Ischiorectal abscess |
| K61.31 | Horseshoe abscess |
| K61.39 | Other ischiorectal abscess |
| K61.4 | Intrasphincteric abscess |
| K61.5 | Supralevator abscess |
| K62 | Other diseases of anus and rectum |
| K62.0 | Anal polyp |
| K62.1 | Rectal polyp |
| K62.2 | Anal prolapse |
| K62.3 | Rectal prolapse |
| K62.4 | Stenosis of anus and rectum |
| K62.5 | Hemorrhage of anus and rectum |
| K62.6 | Ulcer of anus and rectum |
| K62.7 | Radiation proctitis |
| K62.8 | Other specified diseases of anus and rectum |
| K62.81 | Anal sphincter tear (healed) (nontraumatic) (old) |
| K62.82 | Dysplasia of anus |
| K62.89 | Other specified diseases of anus and rectum |
| K62.9 | Disease of anus and rectum, unspecified |
| K63 | Other diseases of intestine |
| K63.0 | Abscess of intestine |
| K63.1 | Perforation of intestine (nontraumatic) |
| K63.2 | Fistula of intestine |
| K63.3 | Ulcer of intestine |
| K63.4 | Enteroptosis |
| K63.5 | Polyp of colon |
| K63.8 | Other specified diseases of intestine |
| K63.81 | Dieulafoy lesion of intestine |
| K63.89 | Other specified diseases of intestine |
| K63.9 | Disease of intestine, unspecified |
| K64 | Hemorrhoids and perianal venous thrombosis |
| K64.0 | First degree hemorrhoids |
| K64.1 | Second degree hemorrhoids |
| K64.2 | Third degree hemorrhoids |
| K64.3 | Fourth degree hemorrhoids |
| K64.4 | Residual hemorrhoidal skin tags |
| K64.5 | Perianal venous thrombosis |
| K64.8 | Other hemorrhoids |
| K64.9 | Unspecified hemorrhoids |
| K65 | Peritonitis |
| K65.0 | Generalized (acute) peritonitis |
| K65.1 | Peritoneal abscess |
| K65.2 | Spontaneous bacterial peritonitis |
| K65.3 | Choleperitonitis |
| K65.4 | Sclerosing mesenteritis |
| K65.8 | Other peritonitis |
| K65.9 | Peritonitis, unspecified |
| K66 | Other disorders of peritoneum |
| K66.0 | Peritoneal adhesions (postprocedural) (postinfection) |
| K66.1 | Hemoperitoneum |
| K66.8 | Other specified disorders of peritoneum |
| K66.9 | Disorder of peritoneum, unspecified |
| K67 | Disorders of peritoneum in infectious diseases classified elsewhere |
| K68 | Disorders of retroperitoneum |
| K68.1 | Retroperitoneal abscess |
| K68.11 | Postprocedural retroperitoneal abscess |
| K68.12 | Psoas muscle abscess |
| K68.19 | Other retroperitoneal abscess |
| K68.9 | Other disorders of retroperitoneum |