ICD-10-CM 2027 diagnosis code
K55.01Acute (reversible) ischemia of small intestine
K55.01 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.
Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About K55.01
K55.01 is the ICD-10-CM diagnosis code for acute (reversible) ischemia of small intestine. It belongs to category K55 (vascular disorders of intestine), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
Within K55.0 (acute vascular disorders of intestine), K55.01 is specifically for acute (reversible) ischemia of small intestine. Related codes cover infarction of small intestine (K55.02), (reversible) ischemia of large intestine (K55.03), infarction of large intestine (K55.04), (reversible) ischemia of intestine, part unspecified (K55.05) and infarction of intestine, part unspecified (K55.06).
To report this condition, pick the subcode that matches the documentation: K55.011 (intestine), K55.012 (intestine) and K55.019 (extent unspecified).
It was added in FY2017, effective October 1, 2016.
Specific codes under K55.01
Notes that apply from higher levels
Instructions written at a parent level also apply to K55.01.
Broader instructions also apply from Chapter 11: Diseases of the digestive system.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2017 (effective 10/1/2016): Added
- No changes since FY2017.
Common questions about K55.01
Is K55.01 billable?
- No. K55.01 is a header code. Report one of its more specific subcodes instead.