About Section K55-K64

Section K55-K64 covers Other diseases of intestines within Chapter 11 of the ICD-10-CM Tabular List. This section includes diagnosis codes ranging from K55 to K64. Each code below includes its description, billable status, and links to detailed coding guidelines.
Diagnosis Codes 206 entries
K55Vascular disorders of intestineNon-Billable›K55.0Acute vascular disorders of intestineNon-Billable›K55.01Acute (reversible) ischemia of small intestineNon-Billable›K55.011Focal (segmental) acute (reversible) ischemia of small intestineBillable›K55.012Diffuse acute (reversible) ischemia of small intestineBillable›K55.019Acute (reversible) ischemia of small intestine, extent unspecifiedBillable›K55.02Acute infarction of small intestineNon-Billable›K55.021Focal (segmental) acute infarction of small intestineBillable›K55.022Diffuse acute infarction of small intestineBillable›K55.029Acute infarction of small intestine, extent unspecifiedBillable›K55.03Acute (reversible) ischemia of large intestineNon-Billable›K55.031Focal (segmental) acute (reversible) ischemia of large intestineBillable›K55.032Diffuse acute (reversible) ischemia of large intestineBillable›K55.039Acute (reversible) ischemia of large intestine, extent unspecifiedBillable›K55.04Acute infarction of large intestineNon-Billable›K55.041Focal (segmental) acute infarction of large intestineBillable›K55.042Diffuse acute infarction of large intestineBillable›K55.049Acute infarction of large intestine, extent unspecifiedBillable›K55.05Acute (reversible) ischemia of intestine, part unspecifiedNon-Billable›K55.051Focal (segmental) acute (reversible) ischemia of intestine, part unspecifiedBillable›K55.052Diffuse acute (reversible) ischemia of intestine, part unspecifiedBillable›K55.059Acute (reversible) ischemia of intestine, part and extent unspecifiedBillable›K55.06Acute infarction of intestine, part unspecifiedNon-Billable›K55.061Focal (segmental) acute infarction of intestine, part unspecifiedBillable›K55.062Diffuse acute infarction of intestine, part unspecifiedBillable›K55.069Acute infarction of intestine, part and extent unspecifiedBillable›K55.1Chronic vascular disorders of intestineBillable›K55.2Angiodysplasia of colonNon-Billable›K55.20Angiodysplasia of colon without hemorrhageBillable›K55.21Angiodysplasia of colon with hemorrhageBillable›K55.3Necrotizing enterocolitisNon-Billable›K55.30Necrotizing enterocolitis, unspecifiedBillable›K55.31Stage 1 necrotizing enterocolitisBillable›K55.32Stage 2 necrotizing enterocolitisBillable›K55.33Stage 3 necrotizing enterocolitisBillable›K55.8Other vascular disorders of intestineBillable›K55.9Vascular disorder of intestine, unspecifiedBillable›K56Paralytic ileus and intestinal obstruction without herniaNon-Billable›K56.0Paralytic ileusBillable›K56.1IntussusceptionBillable›K56.2VolvulusBillable›K56.3Gallstone ileusBillable›K56.4Other impaction of intestineNon-Billable›K56.41Fecal impactionBillable›K56.49Other impaction of intestineBillable›K56.5Intestinal adhesions [bands] with obstruction (postinfection)Non-Billable›K56.50Intestinal adhesions [bands], unspecified as to partial versus complete obstructionBillable›K56.51Intestinal adhesions [bands], with partial obstructionBillable›K56.52Intestinal adhesions [bands] with complete obstructionBillable›K56.6Other and unspecified intestinal obstructionNon-Billable›K56.60Unspecified intestinal obstructionNon-Billable›K56.600Partial intestinal obstruction, unspecified as to causeBillable›K56.601Complete intestinal obstruction, unspecified as to causeBillable›K56.609Unspecified intestinal obstruction, unspecified as to partial versus complete obstructionBillable›K56.69Other intestinal obstructionNon-Billable›K56.690Other partial intestinal obstructionBillable›K56.691Other complete intestinal obstructionBillable›K56.699Other intestinal obstruction unspecified as to partial versus complete obstructionBillable›K56.7Ileus, unspecifiedBillable›K57Diverticular disease of intestineNon-Billable›K57.0Diverticulitis of small intestine with perforation and abscessNon-Billable›K57.00Diverticulitis of small intestine with perforation and abscess without bleedingBillable›K57.01Diverticulitis of small intestine with perforation and abscess with bleedingBillable›K57.1Diverticular disease of small intestine without perforation or abscessNon-Billable›K57.10Diverticulosis of small intestine without perforation or abscess without bleedingBillable›K57.11Diverticulosis of small intestine without perforation or abscess with bleedingBillable›K57.12Diverticulitis of small intestine without perforation or abscess without bleedingBillable›K57.13Diverticulitis of small intestine without perforation or abscess with bleedingBillable›K57.2Diverticulitis of large intestine with perforation and abscessNon-Billable›K57.20Diverticulitis of large intestine with perforation and abscess without bleedingBillable›K57.21Diverticulitis of large intestine with perforation and abscess with bleedingBillable›K57.3Diverticular disease of large intestine without perforation or abscessNon-Billable›K57.30Diverticulosis of large intestine without perforation or abscess without bleedingBillable›K57.31Diverticulosis of large intestine without perforation or abscess with bleedingBillable›K57.32Diverticulitis of large intestine without perforation or abscess without bleedingBillable›K57.33Diverticulitis of large intestine without perforation or abscess with bleedingBillable›K57.4Diverticulitis of both small and large intestine with perforation and abscessNon-Billable›K57.40Diverticulitis of both small and large intestine with perforation and abscess without bleedingBillable›K57.41Diverticulitis of both small and large intestine with perforation and abscess with bleedingBillable›K57.5Diverticular disease of both small and large intestine without perforation or abscessNon-Billable›K57.50Diverticulosis of both small and large intestine without perforation or abscess without bleedingBillable›K57.51Diverticulosis of both small and large intestine without perforation or abscess with bleedingBillable›K57.52Diverticulitis of both small and large intestine without perforation or abscess without bleedingBillable›K57.53Diverticulitis of both small and large intestine without perforation or abscess with bleedingBillable›K57.8Diverticulitis of intestine, part unspecified, with perforation and abscessNon-Billable›K57.80Diverticulitis of intestine, part unspecified, with perforation and abscess without bleedingBillable›K57.81Diverticulitis of intestine, part unspecified, with perforation and abscess with bleedingBillable›K57.9Diverticular disease of intestine, part unspecified, without perforation or abscessNon-Billable›K57.90Diverticulosis of intestine, part unspecified, without perforation or abscess without bleedingBillable›K57.91Diverticulosis of intestine, part unspecified, without perforation or abscess with bleedingBillable›K57.92Diverticulitis of intestine, part unspecified, without perforation or abscess without bleedingBillable›K57.93Diverticulitis of intestine, part unspecified, without perforation or abscess with bleedingBillable›K58Irritable bowel syndromeNon-Billable›K58.0Irritable bowel syndrome with diarrheaBillable›K58.1Irritable bowel syndrome with constipationBillable›K58.2Mixed irritable bowel syndromeBillable›K58.8Other irritable bowel syndromeBillable›K58.9Irritable bowel syndrome, unspecifiedBillable›K59Other functional intestinal disordersNon-Billable›K59.0ConstipationNon-Billable›K59.00Constipation, unspecifiedBillable›K59.01Slow transit constipationBillable›K59.02Outlet dysfunction constipationBillable›K59.03Drug induced constipationBillable›K59.04Chronic idiopathic constipationBillable›K59.09Other constipationBillable›K59.1Functional diarrheaBillable›K59.2Neurogenic bowel, not elsewhere classifiedBillable›K59.3Megacolon, not elsewhere classifiedNon-Billable›K59.31Toxic megacolonBillable›K59.39Other megacolonBillable›K59.4Anal spasmBillable›K59.8Other specified functional intestinal disordersNon-Billable›K59.81Ogilvie syndromeBillable›K59.89Other specified functional intestinal disordersBillable›K59.9Functional intestinal disorder, unspecifiedBillable›K60Fissure and fistula of anal and rectal regionsNon-Billable›K60.0Acute anal fissureBillable›K60.1Chronic anal fissureBillable›K60.2Anal fissure, unspecifiedBillable›K60.3Anal fistulaNon-Billable›K60.30Anal fistula, unspecifiedBillable›K60.31Anal fistula, simpleNon-Billable›K60.311Anal fistula, simple, initialBillable›K60.312Anal fistula, simple, persistentBillable›K60.313Anal fistula, simple, recurrentBillable›K60.319Anal fistula, simple, unspecifiedBillable›K60.32Anal fistula, complexNon-Billable›K60.321Anal fistula, complex, initialBillable›K60.322Anal fistula, complex, persistentBillable›K60.323Anal fistula, complex, recurrentBillable›K60.329Anal fistula, complex, unspecifiedBillable›K60.4Rectal fistulaNon-Billable›K60.40Rectal fistula, unspecifiedBillable›K60.41Rectal fistula, simpleNon-Billable›K60.411Rectal fistula, simple, initialBillable›K60.412Rectal fistula, simple, persistentBillable›K60.413Rectal fistula, simple, recurrentBillable›K60.419Rectal fistula, simple, unspecifiedBillable›K60.42Rectal fistula, complexNon-Billable›K60.421Rectal fistula, complex, initialBillable›K60.422Rectal fistula, complex, persistentBillable›K60.423Rectal fistula, complex, recurrentBillable›K60.429Rectal fistula, complex, unspecifiedBillable›K60.5Anorectal fistulaNon-Billable›K60.50Anorectal fistula, unspecifiedBillable›K60.51Anorectal fistula, simpleNon-Billable›K60.511Anorectal fistula, simple, initialBillable›K60.512Anorectal fistula, simple, persistentBillable›K60.513Anorectal fistula, simple, recurrentBillable›K60.519Anorectal fistula, simple, unspecifiedBillable›K60.52Anorectal fistula, complexNon-Billable›K60.521Anorectal fistula, complex, initialBillable›K60.522Anorectal fistula, complex, persistentBillable›K60.523Anorectal fistula, complex, recurrentBillable›K60.529Anorectal fistula, complex, unspecifiedBillable›K61Abscess of anal and rectal regionsNon-Billable›K61.0Anal abscessBillable›K61.1Rectal abscessBillable›K61.2Anorectal abscessBillable›K61.3Ischiorectal abscessNon-Billable›K61.31Horseshoe abscessBillable›K61.39Other ischiorectal abscessBillable›K61.4Intrasphincteric abscessBillable›K61.5Supralevator abscessBillable›K62Other diseases of anus and rectumNon-Billable›K62.0Anal polypBillable›K62.1Rectal polypBillable›K62.2Anal prolapseBillable›K62.3Rectal prolapseBillable›K62.4Stenosis of anus and rectumBillable›K62.5Hemorrhage of anus and rectumBillable›K62.6Ulcer of anus and rectumBillable›K62.7Radiation proctitisBillable›K62.8Other specified diseases of anus and rectumNon-Billable›K62.81Anal sphincter tear (healed) (nontraumatic) (old)Billable›K62.82Dysplasia of anusBillable›K62.89Other specified diseases of anus and rectumBillable›K62.9Disease of anus and rectum, unspecifiedBillable›K63Other diseases of intestineNon-Billable›K63.0Abscess of intestineBillable›K63.1Perforation of intestine (nontraumatic)Billable›K63.2Fistula of intestineBillable›K63.3Ulcer of intestineBillable›K63.4EnteroptosisBillable›K63.5Polyp of colonBillable›K63.8Other specified diseases of intestineNon-Billable›K63.81Dieulafoy lesion of intestineBillable›K63.82Intestinal microbial overgrowthNon-Billable›K63.821Small intestinal bacterial overgrowthNon-Billable›K63.8211Small intestinal bacterial overgrowth, hydrogen-subtypeBillable›K63.8212Small intestinal bacterial overgrowth, hydrogen sulfide-subtypeBillable›K63.8219Small intestinal bacterial overgrowth, unspecifiedBillable›K63.822Small intestinal fungal overgrowthBillable›K63.829Intestinal methanogen overgrowth, unspecifiedBillable›K63.89Other specified diseases of intestineBillable›K63.9Disease of intestine, unspecifiedBillable›K64Hemorrhoids and perianal venous thrombosisNon-Billable›K64.0First degree hemorrhoidsBillable›K64.1Second degree hemorrhoidsBillable›K64.2Third degree hemorrhoidsBillable›K64.3Fourth degree hemorrhoidsBillable›K64.4Residual hemorrhoidal skin tagsBillable›K64.5Perianal venous thrombosisBillable›K64.8Other hemorrhoidsBillable›K64.9Unspecified hemorrhoidsBillable›