ICD-10 Diagnosis Code K31.9

Disease of stomach and duodenum, unspecified

Diagnosis Code K31.9

ICD-10: K31.9
Short Description: Disease of stomach and duodenum, unspecified
Long Description: Disease of stomach and duodenum, unspecified
This is the 2017 version of the ICD-10-CM diagnosis code K31.9

Code Classification
  • Diseases of the digestive system
    • Diseases of esophagus, stomach and duodenum (K20-K31)
      • Other diseases of stomach and duodenum (K31)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code K31.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
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.

  • Disorder of duodenum
  • Disorder of stomach
  • Erosive duodenopathy
  • Erosive gastropathy
  • Esophageal, stomach and duodenal diseases
  • Functional disease present
  • Functional disorder of gastrointestinal tract
  • Functional disorder of stomach
  • Gastric dysplasia
  • Gastritis medicamentosa
  • Gastroduodenal disorder
  • Hypertrophic gastropathy
  • Lesion of stomach
  • Mild stomach dysplasia
  • Moderate stomach dysplasia
  • Non-steroidal anti-inflammatory drug-associated gastropathy
  • Papulous gastropathy
  • Reactive gastropathy
  • Severe stomach dysplasia
  • Stomach problem

Information for Patients

Stomach Disorders

Also called: Gastric disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine.

Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with over-the-counter medicines and lifestyle changes, such as avoiding fatty foods or eating more slowly. Other problems like peptic ulcers or GERD require medical attention.

You should see a doctor if you have any of the following:

  • Blood when you have a bowel movement
  • Severe abdominal pain
  • Heartburn not relieved by antacids
  • Unintended weight loss
  • Ongoing vomiting or diarrhea

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Bezoar
  • Dumping Syndrome - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • EGD discharge
  • Gastrectomy
  • Gastritis
  • Gastroparesis
  • Pyloric stenosis
  • Stomach acid test
  • Upper GI and small bowel series

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