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  6. 2024 ICD-10-CM Code K26.9

2024 ICD-10-CM Diagnosis Code K26.9

Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

ICD-10-CM Code:
K26.9
ICD-10 Code for:
Duodenal ulcer, unsp as acute or chronic, w/o hemor or perf
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the digestive system
    (K00–K95)
    • Diseases of esophagus, stomach and duodenum
      (K20-K31)
      • Duodenal ulcer
        (K26)

K26.9 is a billable diagnosis code used to specify a medical diagnosis of duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like K26.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abnormal hormone secretion
  • Abnormality of secretion of gastrin
  • Childhood duodenal ulcer
  • Chronic duodenitis
  • Chronic duodenitis
  • Chronic inflammatory small bowel disease
  • Chronic inflammatory small bowel disease
  • Combined gastric AND duodenal ulcer
  • Duodenal erosion
  • Duodenal ulcer caused by alcohol
  • Duodenal ulcer caused by bacterium
  • Duodenal ulcer caused by bacterium
  • Duodenal ulcer caused by bacterium
  • Duodenal ulcer caused by drug
  • Duodenal ulcer caused by drug
  • Duodenal ulcer caused by drug
  • Duodenal ulcer caused by drug
  • Duodenal ulcer caused by drug
  • Duodenal ulcer caused by fungus
  • Duodenal ulcer caused by Helicobacter pylori
  • 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 non-steroidal anti-inflammatory drug
  • Duodenal ulcer caused by virus
  • Duodenal ulcer due to celiac disease
  • Duodenal ulcer due to Crohn disease
  • Duodenal ulcer due to IgA vasculitis
  • Duodenal ulcer due to sarcoidosis
  • Duodenal ulcer due to vasculitis
  • Duodenal ulcer due to vasculitis
  • Duodenal ulcer due to Zollinger-Ellison syndrome
  • Duodenal ulcer induced by platelet aggregation inhibitor
  • Duodenal ulcer with increased serum pepsinogen I
  • Duodenal ulcer without hemorrhage AND without perforation
  • 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 of small intestine
  • Essential tremor
  • Familial duodenal ulcer associated with rapid gastric emptying
  • Familial hypergastrinemic duodenal ulcer
  • Gastroduodenal disorder
  • Giant duodenal ulcer
  • Hereditary essential tremor
  • Increased gastrin secretion
  • Lymphocytic duodenal ulcer
  • Lymphocytic duodenitis
  • Non-steroidal anti-inflammatory drug-induced enteropathy
  • Non-steroidal anti-inflammatory drug-induced enteropathy
  • Normopepsinogenemic familial duodenal ulcer
  • Parasitic duodenal ulcer
  • Postpyloric ulcer
  • Recurrent duodenal ulcer
  • Stress ulcer of duodenum
  • Traumatic ulcer of small intestine
  • Tremor, nystagmus, duodenal ulcer syndrome
  • Ulcer of anastomosis
  • Ulcer of duodenum
  • Ulcer of duodenum caused by chemical
  • Ulcer of duodenum caused by chemical
  • Ulcer of duodenum due to infection
  • Ulcer of intestine due to immunoglobulin A vasculitis
  • Ulcer of small intestine caused by radiation

Clinical Classification

Clinical Information

  • Essential Tremor

    a relatively common disorder characterized by a fairly specific pattern of tremors which are most prominent in the upper extremities and neck, inducing titubations of the head. the tremor is usually mild, but when severe may be disabling. an autosomal dominant pattern of inheritance may occur in some families (i.e., familial tremor). (mov disord 1988;13(1):5-10)

  • Essential Tremor

    a movement disorder characterized by involuntary and rhythmic shaking of parts of the body, most often the hands or arms, that can be triggered or worsened by physical or environmental stressors. essential tremor may be progressive and can be inherited in an autosomal dominant manner.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert K26.9 to ICD-9-CM

  • ICD-9-CM Code: 532.90 - Duodenal ulcer NOS
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Peptic 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


[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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.