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ICD-10-CM 2027 diagnosis code

D72.9Disorder of white blood cells, unspecified

✓ Billable / specific

D72.9 is a valid, billable ICD-10-CM code for disorder of white blood cells, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 D72.9

D72.9 is the ICD-10-CM diagnosis code for disorder of white blood cells, unspecified. It belongs to category D72 (other disorders of white blood cells), 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within D72, choose D72.9 (Disorder of white blood cells, unspecified) only when documentation doesn't support a more specific option: genetic anomalies of leukocytes (D72.0), eosinophilia (D72.1) and other specified disorders of white blood cells (D72.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 814 (Reticuloendothelial and Immunity Disorders with MCC, relative weight 2.0729), DRG 815 (Reticuloendothelial and Immunity Disorders with CC, relative weight 1.0444) and DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC, relative weight 0.7381), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 288.9 (unspecified disease of white blood cells).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Abnormal leukocyte differential NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to D72.9.

› From D72 Other disorders of white blood cells
Excludes1
Excludes2
  • neutropenia (D70)

Broader instructions also apply from Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.

Alphabetic index entries

5 entries

Terms in the official ICD-10-CM index that lead to D72.9.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 288.9Unspecified disease of white blood cellsexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about D72.9

Is D72.9 billable?

Yes. D72.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can D72.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict D72.9 as a principal diagnosis.

Is D72.9 a CC or MCC?

No. D72.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does D72.9 group to?

D72.9 is used in the MS-DRG v44.0 logic for MS-DRG 814 (Reticuloendothelial and Immunity Disorders with MCC), MS-DRG 815 (Reticuloendothelial and Immunity Disorders with CC) and MS-DRG 816 (Reticuloendothelial and Immunity Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for D72.9?

The CMS General Equivalence Mappings map D72.9 to ICD-9-CM 288.9.