ICD-10-CM 2027 diagnosis code
K31.81Angiodysplasia of stomach and duodenum
K31.81 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About K31.81
K31.81 is the ICD-10-CM diagnosis code for Angiodysplasia of stomach and duodenum. It belongs to category K31 (other diseases of stomach and duodenum), block K20-K31 (diseases of esophagus, stomach and duodenum) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.
Within K31.8 (other specified diseases of stomach and duodenum), K31.81 is specifically for Angiodysplasia of stomach and duodenum. Related codes cover Dieulafoy lesion (hemorrhagic) of stomach and duodenum (K31.82), Achlorhydria (K31.83), Gastroparesis (K31.84) and other diseases of stomach and duodenum (K31.89).
To report this condition, pick the subcode that matches the documentation: K31.811 (with bleeding) and K31.819 (without bleeding).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under K31.81
Notes that apply from higher levels
Instructions written at a parent level also apply to K31.81.
Broader instructions also apply from K20-K31 Diseases of esophagus, stomach and duodenum and Chapter 11: Diseases of the digestive system.
Codes whose notes reference K31.81
- K55Excludes2
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about K31.81
Is K31.81 billable?
- No. K31.81 is a header code. Report one of its more specific subcodes instead.