Version 2024

2024 ICD-10-CM Diagnosis Code K31

Other diseases of stomach and duodenum

ICD-10-CM Code:
Short Description:
Other diseases of stomach and duodenum
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the digestive system
    • Diseases of esophagus, stomach and duodenum
      • Other diseases of stomach and duodenum

K31 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other diseases of stomach and duodenum. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Other diseases of stomach and duodenum

Non-specific codes like K31 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for other diseases of stomach and duodenum:

  • Use K31.0 for Acute dilatation of stomach - BILLABLE CODE

  • Use K31.1 for Adult hypertrophic pyloric stenosis - BILLABLE CODE

  • Use K31.2 for Hourglass stricture and stenosis of stomach - BILLABLE CODE

  • Use K31.3 for Pylorospasm, not elsewhere classified - BILLABLE CODE

  • Use K31.4 for Gastric diverticulum - BILLABLE CODE

  • Use K31.5 for Obstruction of duodenum - BILLABLE CODE

  • Use K31.6 for Fistula of stomach and duodenum - BILLABLE CODE

  • Use K31.7 for Polyp of stomach and duodenum - BILLABLE CODE

  • K31.8 for Other specified diseases of stomach and duodenum - NON-BILLABLE CODE

  • K31.81 for Angiodysplasia of stomach and duodenum - NON-BILLABLE CODE

  • Use K31.82 for Dieulafoy lesion (hemorrhagic) of stomach and duodenum - BILLABLE CODE

  • Use K31.83 for Achlorhydria - BILLABLE CODE

  • Use K31.84 for Gastroparesis - BILLABLE CODE

  • Use K31.89 for Other diseases of stomach and duodenum - BILLABLE CODE

  • Use K31.9 for Disease of stomach and duodenum, unspecified - BILLABLE CODE

  • K31.A for Gastric intestinal metaplasia - NON-BILLABLE CODE

  • Use K31.A0 for Gastric intestinal metaplasia, unspecified - BILLABLE CODE

  • K31.A1 for Gastric intestinal metaplasia without dysplasia - NON-BILLABLE CODE

  • K31.A2 for Gastric intestinal metaplasia with dysplasia - NON-BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • functional disorders of stomach

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

Patient Education

Stomach 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

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.