ICD-10 Code K26.9

Duodenal ulcer, unsp as acute or chronic, w/o hemor or perf

Diagnosis Code K26.9

ICD-10: K26.9
Short Description: Duodenal ulcer, unsp as acute or chronic, w/o hemor or perf
Long Description: Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
Version 2019 of the ICD-10-CM diagnosis code K26.9

Valid for Submission
The code K26.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the digestive system (K00–K93)
    • Diseases of esophagus, stomach and duodenum (K20-K31)
      • Duodenal ulcer (K26)
Version 2019 Billable Code

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code K26.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9
  • 532.90 - Duodenal ulcer NOS (Approximate Flag)

  • Childhood duodenal ulcer
  • Chronic duodenitis
  • Chronic duodenitis
  • Combined gastric AND duodenal ulcer
  • Common duodenal ulcer
  • Duodenal erosion
  • Duodenal ulcer caused by bacterium
  • Duodenal ulcer caused by drug
  • Duodenal ulcer caused by fungus
  • Duodenal ulcer caused by Helicobacter pylori
  • Duodenal ulcer caused by Helicobacter pylori and non-steroidal anti-inflammatory agent
  • Duodenal ulcer caused by ionizing radiation
  • Duodenal ulcer caused by non-steroidal anti-inflammatory drug
  • Duodenal ulcer caused by virus
  • Duodenal ulcer disease
  • Duodenal ulcer due to Zollinger-Ellison syndrome
  • Duodenal ulcer induced by anti-platelet agent
  • Duodenal ulcer with increased serum pepsinogen I
  • Duodenal ulcer without hemorrhage AND without perforation
  • Duodenal ulcer without hemorrhage AND without perforation but with obstruction
  • Duodenal ulcer without hemorrhage, without perforation AND without obstruction
  • Eosinophilic duodenal ulcer
  • Eosinophilic duodenitis
  • Eosinophilic enteritis
  • Familial duodenal ulcer associated with rapid gastric emptying
  • Familial hypergastrinemic duodenal ulcer
  • Gastroduodenal disorder
  • Giant duodenal ulcer
  • Helicobacter pylori gastrointestinal tract infection
  • Infection caused by Helicobacter pylori
  • Lymphocytic duodenal ulcer
  • Lymphocytic duodenitis
  • Non-steroidal anti-inflammatory drug-induced enteropathy
  • Normopepsinogenemic familial duodenal ulcer
  • Postpyloric ulcer
  • Recurrent duodenal ulcer
  • Stress ulcer of duodenum
  • Ulcer of anastomosis
  • Ulcer of duodenum caused by chemical
  • Ulcer of small intestine caused by radiation

Index to Diseases and Injuries
References found for the code K26.9 in the Index to Diseases and Injuries:

Information for Patients

Peptic Ulcer

Also called: Duodenal ulcer, Gastric ulcer, Stomach ulcer, Ulcer

A peptic ulcer is a sore in the lining of your stomach or your duodenum, the first part of your small intestine. A burning stomach pain is the most common symptom. The pain

  • Starts between meals or during the night
  • Briefly stops if you eat or take antacids
  • Lasts for minutes to hours
  • Comes and goes for several days or weeks

Peptic ulcers happen when the acids that help you digest food damage the walls of the stomach or duodenum. The most common cause is infection with a bacterium called Helicobacter pylori. Another cause is the long-term use of nonsteroidal anti-inflammatory medicines (NSAIDs) such as aspirin and ibuprofen. Stress and spicy foods do not cause ulcers, but can make them worse.

To see if you have an H. pylori infection, your doctor will test your blood, breath, or stool. Your doctor also may look inside your stomach and duodenum by doing an endoscopy or x-ray.

Peptic ulcers will get worse if not treated. Treatment may include medicines to reduce stomach acids or antibiotics to kill H. pylori. Antacids and milk can't heal peptic ulcers. Not smoking and avoiding alcohol can help. You may need surgery if your ulcers don't heal.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Culture - duodenal tissue (Medical Encyclopedia)
  • Peptic ulcer (Medical Encyclopedia)
  • Stomach acid test (Medical Encyclopedia)
  • Tests for H. pylori (Medical Encyclopedia)
  • Zollinger-Ellison syndrome (Medical Encyclopedia)

[Read More]

ICD-10 Footnotes

General Equivalence Map Definitions
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.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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