2026 ICD-10-CM Diagnosis Code D71Functional disorders of polymorphonuclear neutrophils

ICD-10-CM Codes›D50–D89›D70-D77›D71

ICD-10-CM D71
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D71 is a non-billable ICD-10-CM category code for functional disorders of polymorphonuclear neutrophils, so it cannot be submitted on claims. Use a more specific code from this category instead, such as D71.1, D71.8, and D71.9. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diseases of white blood cells.

For Medicare Advantage risk adjustment, D71 maps to CMS-HCC Category 115 (Specified Immunodeficiencies and White Blood Cell Disorders) under the V28 model, adding a risk factor of about 0.565 for a community, non-dual, aged beneficiary in payment year 2026.

Code Identity

ICD-10-CM Code
D71
Billable Status
No — Non-Billable Category
Code Describes
Functional disorders of polymorphonuclear neutrophils
Short Description
Functional disorders of polymorphonuclear neutrophils
Same as the full description in the CMS dataset.
Chapter
D70-D77
Other disorders of blood and blood-forming organs

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD70-D77Other disorders of blood and blood-forming organs
CategoryD71Functional disorders of polymorphonuclear neutrophils
This CodeD71Functional disorders of polymorphonuclear neutrophils

Specific Coding for Functional disorders of polymorphonuclear neutrophilsOverview

Non-specific codes like D71 require more characters. Use one of these billable codes instead:

  • Use D71.1 for Leukocyte adhesion deficiency

  • Use D71.8 for Other functional disorders of polymorphonuclear neutrophils

  • Use D71.9 for Functional disorders of polymorphonuclear neutrophils, unspecified

Medicare Risk Adjustment (HCC)Billing

D71 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2026.

CMS-HCC V28 Category (Payment Model)
HCC 115— Specified Immunodeficiencies and White Blood Cell Disorders
Payment HCC · PY 2026 one of 19 ICD-10-CM codes in this category
Risk Adjustment Factor (RAF) Weight
+0.565
community, non-dual, aged · ranges 0.302–0.692 across segments
Hierarchy
Superseded by HCC 114
a more severe related category takes the payment when both are reported
Prior Model (CMS-HCC V24)
HCC 47
V24 retired V28 pays 100% of MA risk scores since PY 2026
Other CMS Models
PACE (CMS-HCC V22): HCC 47 · ESRD (V21): HCC 47 · ESRD (V24): HCC 47
ESRD V21 weights: 0.097 dialysis, 0.549–0.688 functioning graft · ESRD V24 weights: 0.078 dialysis, 0.523–0.803 functioning graft
Part D (RxHCC)
Not mapped
D71 does not risk-adjust in the RxHCC prescription drug model

Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR BLD007
Diseases of white blood cells
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Blood Disorders

Your blood is living tissue made up of liquid and solids. The liquid part, called plasma, is made of water, salts and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells and platelets.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D71 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
288.1 Function dis neutrophils
Exact Match The mapping is direct, with no qualifiers.

Code History & ChangesHistory

Replaced This code was replaced in the FY 2026 code set by:

  • D71.1 - Leukocyte adhesion deficiency
  • D71.1 - Leukocyte adhesion deficiency
  • D71.1 - Leukocyte adhesion deficiency
  • D71.1 - Leukocyte adhesion deficiency
  • D71.1 - Leukocyte adhesion deficiency
  • D71.1 - Leukocyte adhesion deficiency
  • D71.8 - Other functional disorders of polymorphonuclear neutrophils
  • D71.8 - Other functional disorders of polymorphonuclear neutrophils
  • D71.8 - Other functional disorders of polymorphonuclear neutrophils
  • D71.8 - Other functional disorders of polymorphonuclear neutrophils
  • D71.8 - Other functional disorders of polymorphonuclear neutrophils
  • D71.8 - Other functional disorders of polymorphonuclear neutrophils
  • D71.9 - Functional disorders of polymorphonuclear neutrophils, unsp
  • D71.9 - Functional disorders of polymorphonuclear neutrophils, unsp
  • D71.9 - Functional disorders of polymorphonuclear neutrophils, unsp
  • D71.9 - Functional disorders of polymorphonuclear neutrophils, unsp
  • D71.9 - Functional disorders of polymorphonuclear neutrophils, unsp
  • D71.9 - Functional disorders of polymorphonuclear neutrophils, unsp
FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentRevised in the current code setEffective October 1, 2025 through September 30, 2026.

Questions About D71Overview

What is the ICD-10 code for functional disorders of polymorphonuclear neutrophils?

D71 is the ICD-10-CM category for functional disorders of polymorphonuclear neutrophils, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is D71 (Functional disorders of polymorphonuclear neutrophils) a billable code?

No. This is a category header that groups the codes for functional disorders of polymorphonuclear neutrophils, and headers cannot be submitted on claims. Claims for functional disorders of polymorphonuclear neutrophils need a more specific code from this category, such as D71.1, D71.8, and D71.9.

What is the ICD-9 equivalent of D71?

Under the General Equivalence Mappings, functional disorders of polymorphonuclear neutrophils converts to ICD-9-CM 288.1 (function dis neutrophils). The mapping is a direct match.

What HCC is D71?

D71 (functional disorders of polymorphonuclear neutrophils) maps to CMS-HCC Category 115 (Specified Immunodeficiencies and White Blood Cell Disorders), commonly written as HCC 115, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2026. It mapped to HCC 47 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.

Does D71 risk-adjust for Medicare Advantage payment?

Yes. When documented and reported on a Medicare Advantage encounter, D71 adds a risk adjustment factor of about 0.565 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.302 to 0.692 depending on the payment segment). A more severe related category (HCC 114) supersedes it when both are reported. See the full factor table on the HCC 115 category page.