Diseases of the digestive system
Diseases of esophagus, stomach and duodenum
2021 ICD-10-CM Diagnosis Code K26
2021 ICD-10-CM Diagnosis Code K26
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- K26 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2021 edition of ICD-10-CM K26 became effective on October 1, 2020.
- This is the American ICD-10-CM version of K26 - other international versions of ICD-10 K26 may differ.
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K26. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
"Includes" further defines, or give examples of, the content of the code or category.
- erosion (acute) of duodenum
- duodenum ulcer (peptic)
- postpyloric ulcer (peptic)
The following code(s) above K26
contain annotation back-references
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to K26
- A disorder characterized by a circumscribed, inflammatory and necrotic erosive lesion on the mucosal surface of the duodenal wall.
- A peptic ulcer located in the duodenum.
- An ulcer in the duodenal wall.
- Peptic ulcer located in the duodenum, the shortest and widest portion of the small intestine adjacent to the pylorus of the stomach.
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
Code annotations containing back-references to K26:
ICD-10-CM Codes Adjacent To K26
Acute gastric ulcer with hemorrhage
Acute gastric ulcer with perforation
Acute gastric ulcer with both hemorrhage and perforation
Acute gastric ulcer without hemorrhage or perforation
Chronic or unspecified gastric ulcer with hemorrhage
Chronic or unspecified gastric ulcer with perforation
Chronic or unspecified gastric ulcer with both hemorrhage and perforation
Chronic gastric ulcer without hemorrhage or perforation
Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation
Acute duodenal ulcer with hemorrhage
Acute duodenal ulcer with perforation
Acute duodenal ulcer with both hemorrhage and perforation
Acute duodenal ulcer without hemorrhage or perforation
Chronic or unspecified duodenal ulcer with hemorrhage
Chronic or unspecified duodenal ulcer with perforation
Chronic or unspecified duodenal ulcer with both hemorrhage and perforation
Chronic duodenal ulcer without hemorrhage or perforation
Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
Peptic ulcer, site unspecified
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.