2026 ICD-10-CM Diagnosis Code K52.9Noninfective gastroenteritis and colitis, unspecified

AHRQ’s CCSR groups this code into broader clinical categories.

• Choanal Atresia

  a congenital abnormality that is characterized by a blocked choanae, the opening between the nose and the nasopharynx. blockage can be unilateral or bilateral; bony or membranous.

• Gastroenteritis

  inflammation of any segment of the gastrointestinal tract from esophagus to rectum. causes of gastroenteritis are many including genetic, infection, hypersensitivity, drug effects, and cancer.

• Gastroenteritis, Transmissible, of Swine

  a condition of chronic gastroenteritis in adult pigs and fatal gastroenteritis in piglets caused by a coronavirus.

• Murine hepatitis virus

  a species of the coronavirus genus causing hepatitis in mice. four strains have been identified as mhv 1, mhv 2, mhv 3, and mhv 4 (also known as mhv-jhm, which is neurotropic and causes disseminated encephalomyelitis with demyelination as well as focal liver necrosis).

• Transmissible gastroenteritis virus

  a species of coronavirus causing a fatal disease to pigs under 3 weeks old.

• Macrophage Activation Syndrome

  a serious complication of childhood systemic inflammatory disorders that is thought to be caused by excessive activation and proliferation of t-lymphocytes and macrophages. it is seen predominantly in children with systemic onset juvenile idiopathic arthritis.

• Enterocolitis

  inflammation of the mucosa of both the small intestine and the large intestine. etiology includes ischemia, infections, allergic, and immune responses.

• Enterocolitis, Necrotizing

  enterocolitis with extensive ulceration (ulcer) and necrosis. it is observed primarily in low birth weight infant.

• Enterocolitis, Neutropenic

  a syndrome characterized by inflammation in the ileum, the cecum, and the ascending colon. it is observed in cancer patients with chemotherapy-induced neutropenia or in other immunocompromised individuals (immunocompromised host).

• Enterocolitis, Pseudomembranous

  an acute inflammation of the intestinal mucosa that is characterized by the presence of pseudomembranes or plaques in the small intestine (pseudomembranous enteritis) and the large intestine (pseudomembranous colitis). it is commonly associated with antibiotic therapy and clostridium difficile colonization.

• Crohn Disease

  a chronic transmural inflammation that may involve any part of the digestive tract from mouth to anus, mostly found in the ileum, the cecum, and the colon. in crohn disease, the inflammation, extending through the intestinal wall from the mucosa to the serosa, is characteristically asymmetric and segmental. epithelioid granulomas may be seen in some patients.

• Ileitis

  inflammation of any segment of the ileum and the ileocecal valve.

• Pouchitis

  acute inflammation in the intestinal mucosa of the continent ileal reservoir (or pouch) in patients who have undergone ileostomy and restorative proctocolectomy (proctocolectomy, restorative).

• Typhlitis

  necrotizing inflammation of the cecum (typhlon in greek), sometimes spreading to the appendix and/or the ileum. symptoms include abdominal pain and diarrhea. its pathogenesis is multifactorial. typhlitis is often associated with neutropenia and chemotherapy in immunocompromised individuals (immunocompromised host).

• Colitis

  inflammation of the colon section of the large intestine (intestine, large), usually with symptoms such as diarrhea (often with blood and mucus), abdominal pain, and fever.

• Colitis, Collagenous

  a subtype of microscopic colitis, characterized by chronic watery diarrhea of unknown origin, a normal colonoscopy but abnormal histopathology on biopsy. microscopic examination of biopsy samples taken from the colon show larger-than-normal band of subepithelial collagen.

• Colitis, Ischemic

  inflammation of the colon due to colonic ischemia resulting from alterations in systemic circulation or local vasculature.

• Colitis, Lymphocytic

  a subtype of microscopic colitis, characterized by chronic watery diarrhea of unknown origin, a normal colonoscopy but abnormal histopathology on biopsy. microscopic examination of biopsy samples taken from the colon show infiltration of lymphocytes in the superficial epithelium and the underlying connective tissue (lamina propria).

• Colitis, Microscopic

  a condition characterized by chronic watery diarrhea of unknown origin, a normal colonoscopy but abnormal histopathology on biopsy. this syndrome was first described in 1980 by read and associates. subtypes include collagenous colitis and lymphocytic colitis. both have similar clinical symptoms and are distinguishable only by histology.

• Colitis, Ulcerative

  inflammation of the colon that is predominantly confined to the mucosa. its major symptoms include diarrhea, rectal bleeding, the passage of mucus, and abdominal pain.

• Colitis-Associated Neoplasms

  colonic neoplasms associated with chronic inflammation conditions such as ulcerative colitis and crohn disease.

• Cytomegalovirus Infections

  infection with cytomegalovirus, characterized by enlarged cells bearing intranuclear inclusions. infection may be in almost any organ, but the salivary glands are the most common site in children, as are the lungs in adults.

• Dysentery, Amebic

  dysentery caused by intestinal amebic infection, chiefly with entamoeba histolytica. this condition may be associated with amebic infection of the liver and other distant sites.

• Irritable Bowel Syndrome

  a disorder with chronic or recurrent colonic symptoms without a clearcut etiology. this condition is characterized by chronic or recurrent abdominal pain, bloating, mucus in feces, and an erratic disturbance of defecation.

• Coronavirus

  a member of coronaviridae which causes respiratory or gastrointestinal disease in a variety of vertebrates.

• Cytomegalovirus

  a genus of the family herpesviridae, subfamily betaherpesvirinae, infecting the salivary glands, liver, spleen, lungs, eyes, and other organs, in which they produce characteristically enlarged cells with intranuclear inclusions. infection with cytomegalovirus is also seen as an opportunistic infection in aids.

• Enterocolitis Infectious, CTCAE|Enterocolitis Infectious|Enterocolitis infectious

  a disorder characterized by an infectious process involving the small and/or large intestines.

• Immunotherapy-Related Enterocolitis|Immune Therapy Related Enterocolitis|Immunotherapy Related Enterocolitis

  enterocolitis associated with the use of immunotherapeutic agents.

• AIDS-Related Enterocolitis

  enterocolitis associated with the aids virus.

• Enterocolitis

  an inflammatory process affecting the small intestine and colon. causes include viruses, bacteria, radiation, and antibiotics use.

• Enterocolitis Infectious, CTCAE|Enterocolitis Infectious|Enterocolitis infectious

  a disorder characterized by an infectious process involving the small and large intestines.

• Enterocolitis, CTCAE|Enterocolitis|Enterocolitis

  a disorder characterized by inflammation of the small and large intestines.

• Grade 1 Enterocolitis, CTCAE|Grade 1 Enterocolitis

  asymptomatic; clinical or diagnostic observations only; intervention not indicated

• Grade 2 Enterocolitis Infectious, CTCAE|Grade 2 Enterocolitis infectious

  passage of >3 unformed stools per 24 hrs or duration of illness >48 hrs; moderate abdominal pain; oral intervention indicated (e.g., antibiotic, antifungal, or antiviral)

• Grade 2 Enterocolitis, CTCAE|Grade 2 Enterocolitis

  abdominal pain; mucus or blood in stool

• Grade 3 Enterocolitis Infectious, CTCAE|Grade 3 Enterocolitis infectious

  iv antibiotic, antifungal, or antiviral intervention indicated; invasive intervention indicated; profuse watery diarrhea with signs of hypovolemia; bloody diarrhea; fever; severe abdominal pain; hospitalization indicated

• Grade 3 Enterocolitis, CTCAE|Grade 3 Enterocolitis

  severe or persistent abdominal pain; fever; ileus; peritoneal signs

• Grade 3 Necrotizing Enterocolitis, AE|Grade 3 Necrotizing Enterocolitis|Grade 3 Necrotizing Enterocolitis, Adverse Event

  an adverse event in a newborn characterized by confirmed necrotizing enterocolitis; major care change indicated (e.g. npo, antibiotics, non-urgent surgery).

• Grade 4 Enterocolitis Infectious, CTCAE|Grade 4 Enterocolitis infectious

  life-threatening consequences; urgent intervention indicated

• Grade 4 Enterocolitis, CTCAE|Grade 4 Enterocolitis

  life-threatening consequences; urgent intervention indicated

• Grade 4 Necrotizing Enterocolitis, AE|Grade 4 Necrotizing Enterocolitis|Grade 4 Necrotizing Enterocolitis, Adverse Event

  a necrotizing enterocolitis adverse event in a newborn characterized by bowel perforation (pneumoperitoneum)(modified bell stage iiib); shock, disseminated intravascular coagulation (dic), combined respiratory and metabolic acidosis (modified bell stage iiia); urgent major care change indicated.

• Grade 5 Enterocolitis Infectious, CTCAE|Grade 5 Enterocolitis infectious

  death

• Grade 5 Enterocolitis, CTCAE|Grade 5 Enterocolitis

  death

• Grade 5 Necrotizing Enterocolitis, AE|Grade 5 Necrotizing Enterocolitis|Grade 5 Necrotizing Enterocolitis, Adverse Event

  a necrotizing enterocolitis adverse event in a newborn which results in death.

• Infectious Enterocolitis|Enterocolitis infectious

  an infectious process affecting the small and large intestines. symptoms include diarrhea, cramping abdominal pain, and fever.

• Necrotizing Enterocolitis Totalis

  a severe and often fatal form of necrotizing enterocolitis, in which diffuse ischemia, necrosis, and pneumatosis intestinalis are evident in the small and large intestine. short bowel syndrome is common among survivors.

• Necrotizing Enterocolitis, AE|Necrotizing Enterocolitis|Necrotizing Enterocolitis, Adverse Event|Necrotizing enterocolitis neonatal

  an adverse event in newborns characterized by extensive mucosal ulceration, pseudomembrane formation, submucosal hemorrhage, and necrosis in the intestines .

• Necrotizing Enterocolitis|NEC|NEC|Necrotizing Enterocolitis in Fetus or Newborn|Necrotizing Enterocolitis in Fetus or Newborn

  a fulminating disease of neonates in which there is extensive mucosal ulceration, pseudomembrane formation, submucosal hemorrhage, and necrosis usually of the right colon, cecum, terminal ileum, and appendix, possibly due to perinatal intestinal ischemia and bacterial invasion. progression can lead to necrosis, perforation and/or scarring of the intestinal tract.

• Non-Infectious Gastroenterocolitis

  an inflammatory disease of the stomach and intestines due to a non-infectious cause.

• Suspected Necrotizing Enterocolitis

  the diagnosis assigned when a health care practitioner feels strongly the patient has necrotizing enterocolitis, but lacks definitive proof.

• Crohn Ileitis|Crohn's Ileitis

  crohn's disease affecting the ileum.

• Ileitis

  inflammation of the ileum.

• Rutgeerts Score RUTG0101 Original Result - Diffuse Aphthous Ileitis With Diffusely Inflamed Mucosa|RUTG0101-diffuse aphthous ileitis with diffusely inflamed mucosa|diffuse aphthous ileitis with diffusely inflamed mucosa

  rutgeerts score rutg0101 original result - diffuse aphthous ileitis with diffusely inflamed mucosa.

• Enteropathic Arthritis

  a form of chronic arthritis that is found in some patients with inflammatory bowel disease.

Digestive Diseases

When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.

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