ICD-10-CM 2027 diagnosis code
D71Functional disorders of polymorphonuclear neutrophils
D71 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 FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About D71
D71 is the ICD-10-CM diagnosis code for functional disorders of polymorphonuclear neutrophils. It belongs to block D70-D77 (other disorders of blood and blood-forming organs) and chapter 3 (diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: D71.1 (deficiency), D71.8 (neutrophils) and D71.9 (unspecified).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2026 (expanded into subcodes).
Before ICD-10, this condition was coded in ICD-9-CM as 288.1 (functional disorders of polymorphonuclear neutrophils).
Specific codes under D71
Notes that apply from higher levels
Instructions written at a parent level also apply to D71.
Broader instructions also apply from Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
ICD-9-CM equivalent
Converter →- 288.1Functional disorders of polymorphonuclear neutrophilsexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
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)
- FY2026 (effective 10/1/2025): Expanded — no longer billable