K26
Non-billableDuodenal ulcer
Duodenal ulcer
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Includes
Conditions included under this code
- erosion (acute) of duodenum
- duodenum ulcer (peptic)
- postpyloric ulcer (peptic)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •hiatus herniaK44
Use Additional Code
Additional codes that should follow this code
- code to identify:
- •alcohol abuse and dependenceF10
Child Codes (9)
K26.0Acute duodenal ulcer with hemorrhage
K26.1Acute duodenal ulcer with perforation
K26.2Acute duodenal ulcer with both hemorrhage and perforation
K26.3Acute duodenal ulcer without hemorrhage or perforation
K26.4Chronic or unspecified duodenal ulcer with hemorrhage
K26.5Chronic or unspecified duodenal ulcer with perforation
K26.6Chronic or unsp duodenal ulcer w both hemorrhage and perf
K26.7Chronic duodenal ulcer without hemorrhage or perforation
K26.9Duodenal ulcer, unsp as acute or chronic, w/o hemor or perf
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(22)
UMLS
- Acute erosion of duodenumC0267251
- Acute erosion of duodenum (disorder)C0267251
- erosion (acute) of duodenumC0267251
- DU - Duodenal ulcerC0013295
- DUD - Duodenal ulcer diseaseC0013295
- Duodenal UlcerC0013295
- Duodenal UlcersC0013295
- Duodenal ulcerC0013295
- Duodenal ulcer diseaseC0013295
- Duodenal ulcersC0013295
- Ulcer duodenalC0013295
- Ulcer of duodenumC0013295
- Ulcer of duodenum (disorder)C0013295
- Ulcer, DuodenalC0013295
- Ulcers, DuodenalC0013295
- duodenal ulcerC0013295
- duodenal ulcerationC0013295
- duodenal ulcersC0013295
- duodenum ulcerC0013295
- duodenum ulcer (peptic)C0013295
- duodenum ulcersC0013295
- postpyloric ulcer (peptic)C4290200
Frequently Asked Questions
What is the ICD-10 code for duodenal ulcer?
The ICD-10-CM code for duodenal ulcer is K26. The full clinical description is "Duodenal ulcer". K26 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code K26 mean?
ICD-10-CM code K26 represents “Duodenal ulcer”. It is classified under Chapter 11: Diseases of the Digestive System and is a non-billable header code. Use a more specific child code for billing purposes.
Is K26 a billable code?
No, K26 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 9 child codes under K26.
What chapter is K26 in?
K26 is in Chapter 11: Diseases of the Digestive System (codes K00-K95).
What codes cannot be used with K26?
K26 has Excludes1 notes indicating codes that cannot be used together with it, including: peptic ulcer NOS (K27.-).
What are the subcategories under K26?
K26 has 9 child codes, including: K26.0 (Acute duodenal ulcer with hemorrhage), K26.1 (Acute duodenal ulcer with perforation), K26.2 (Acute duodenal ulcer with both hemorrhage and perforation), K26.3 (Acute duodenal ulcer without hemorrhage or perforation), and 5 more.
Are additional codes required with K26?
Yes, when using K26, also report: ; alcohol abuse and dependence (F10.-).
What are the UMLS CUIs for K26?
K26 is linked to 3 UMLS Concept Unique Identifiers: C0267251, C0013295, C4290200. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does K26 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like duodenal ulcer affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of K26?
K26 maps to the ICD-11 code: DA63.Z (Duodenal ulcer, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.