ICD-10-CM 2027 diagnosis code
R71Abnormality of red blood cells
R71 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 R71
R71 is the ICD-10-CM diagnosis code for abnormality of red blood cells. It belongs to block R70-R79 (abnormal findings on examination of blood, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: R71.0 (hematocrit) and R71.8 (cells).
Don't report R71 together with the conditions in its Excludes1 note: anemias (D50-D64), anemia of premature infant (P61.2), benign (familial) polycythemia (D75.0), congenital anemias (P61.2-P61.4) and 5 more.
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 R71
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to R71.
Broader instructions also apply from R70-R79 Abnormal findings on examination of blood, without diagnosis and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
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 R71
Is R71 billable?
- No. R71 is a header code. Report one of its more specific subcodes instead.