ICD-9 Diagnosis Code 558.9

Noninf gastroenterit NEC

Diagnosis Code 558.9

ICD-9: 558.9
Short Description: Noninf gastroenterit NEC
Long Description: Other and unspecified noninfectious gastroenteritis and colitis
This is the 2014 version of the ICD-9-CM diagnosis code 558.9

Code Classification
  • Diseases of the digestive system (520–579)
    • Noninfective enteritis and colitis (555-558)
      • 558 Other noninfective gastroenteritis and colitis

Information for Medical Professionals

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The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Acute and chronic colitis
  • Acute gastroenteritis
  • Acute hemorrhagic enterocolitis
  • Acute radiation colitis
  • Acute radiation enteritis
  • Allergic ileitis
  • Allergic jejunitis
  • Antibiotic enterocolitis
  • Behcet's colitis
  • Chemical colitis
  • Chronic colitis
  • Chronic proliferative enteritis
  • Colitis
  • Colitis cystica
  • Colitis cystica profunda
  • Collagenous colitis
  • Dietetic colitis
  • Dietetic enteritis
  • Dietetic enterocolitis
  • Dietetic gastroenteritis
  • Dietetic ileitis
  • Dietetic jejunitis
  • Dietetic sigmoiditis
  • Distal colitis
  • Diversion colitis
  • Drug-induced colitis
  • Drug-induced enteritis
  • Eosinophilic gastroenteropathy with predominant muscle layer disease
  • Exacerbation of non-infective colitis
  • Fibrinous enteritis
  • Gastroenteritis
  • Gastrointestinal mucositis
  • Granulomatous enteritis, non-Crohn's disease
  • Hemorrhagic colitis
  • Hemorrhagic enteritis
  • Idiopathic colitis
  • Ileitis
  • Indeterminate colitis
  • Inflammation of large intestine
  • Inflammation of small intestine
  • Inflammation of small intestine and colon
  • Inflammatory bowel disease
  • Inflammatory disorder of digestive tract
  • Iritis with inflammatory bowel disease
  • Jejunitis
  • Juvenile arthritis of inflammatory bowel disease
  • Lymphocytic-plasmacytic colitis
  • Lymphocytic-plasmacytic enteritis
  • Microscopic colitis
  • Neutropaenic enterocolitis
  • Neutropenic colitis
  • Nonbacterial gastroenteritis of infant
  • Noninfectious colitis
  • Noninfectious enteritis
  • Noninfectious gastroenteritis
  • Noninfectious gastroenteritis associated with acquired immunodeficiency syndrome
  • Noninfectious ileitis
  • Noninfectious jejunitis
  • Noninfectious sigmoiditis
  • Non-infective enteritis and colitis
  • Non-specific colitis
  • Non-steroidal anti-inflammatory drug-induced colitis
  • Phlegmonous colitis
  • Phlegmonous enteritis
  • Purulent enteritis
  • Pyogranulomatous enteritis
  • Sigmoiditis
  • Soap colitis
  • Stercoral colitis
  • Suppurative colitis
  • Uremic colitis

Index of Diseases and Injuries
References found for the code 558.9 in the Index of Diseases and Injuries:

Information for Patients

Colonic Diseases

Also called: Large intestine diseases

Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include

  • Colorectal cancer
  • Colonic polyps - extra tissue growing in the colon that can become cancerous
  • Ulcerative colitis - ulcers of the colon and rectum
  • Diverticulitis - inflammation or infection of pouches in the colon
  • Irritable bowel syndrome - an uncomfortable condition causing abdominal cramping and other symptoms

Treatment for colonic diseases varies greatly depending on the disease and its severity. Treatment may involve diet, medicines and in some cases, surgery.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Angiodysplasia of the colon
  • Colitis
  • Colonoscopy
  • Hirschsprung's disease
  • Intestinal ischemia and infarction
  • Large bowel resection
  • Large bowel resection - discharge
  • Lower GI Series - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • Mesenteric angiography
  • Total abdominal colectomy
  • Total colectomy or proctocolectomy - discharge
  • Total proctocolectomy with ileostomy
  • Toxic megacolon
  • Virtual colonoscopy


Small Intestine Disorders

Your small intestine is the longest part of your digestive system - about twenty feet long! It connects your stomach to your large intestine (or colon) and folds many times to fit inside your abdomen. Your small intestine does most of the digesting of the foods you eat. It has three areas called the duodenum, the ileum, and the jejunum.

Problems with the small intestine can include:

  • Bleeding
  • Celiac disease
  • Crohn's disease
  • Infections
  • Intestinal cancer
  • Intestinal obstruction
  • Irritable bowel syndrome
  • Ulcers, such as peptic ulcer

Treatment of disorders of the small intestine depends on the cause.

  • Culture - duodenal tissue
  • Duodenal atresia
  • EGD - esophagogastroduodenoscopy
  • Enteritis
  • Enteroscopy
  • Meckel's diverticulectomy
  • Meckel's diverticulum
  • Necrotizing enterocolitis
  • Short bowel syndrome
  • Small bowel bacterial overgrowth
  • Small bowel resection
  • Small bowel resection - discharge
  • Upper GI and small bowel series

Previous Code
Previous Code 558.42
Next Code
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