2026 ICD-10-CM Diagnosis Code D72.9Disorder of white blood cells, unspecified

ICD-10-CM Codes›D50–D89›D70-D77›D72

ICD-10-CM D72.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D72.9 is a billable ICD-10-CM diagnosis code for disorder of white blood cells, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 814 through 816. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diseases of white blood cells.

Code Identity

ICD-10-CM Code
D72.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of white blood cells, unspecified
Short Description
Disorder of white blood cells, unspecified
Same as the full description in the CMS dataset.
Parent Code
D72
Other disorders of white blood cells

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
CategoryD72Other disorders of white blood cells
This CodeD72.9Disorder of white blood cells, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal granulocyte destruction
  • Abnormal granulocyte production
  • Abnormal lymphocyte production
  • Abnormal neutrophil production
  • B lymphocyte disorder
  • CEBPE-associated autoinflammation, immunodeficiency, neutrophil dysfunction syndrome
  • Decreased granulocyte destruction
  • Decreased granulocyte production
  • Disorder of basophils
  • Disorder of eosinophil
  • Disorder of neutrophils
  • Granulocyte destruction finding
  • Hereditary white blood cell disorder
  • Heritable disorder of neutrophil function
  • Lymphocyte disorder
  • Monocytoid disorder
  • Multiple malformation syndrome, moderate short stature, facial
  • Neutrophil production finding
  • Non-malignant lymphocyte AND/OR plasma cell disorder
  • Non-malignant white cell disorder
  • Qualitative abnormality of granulocyte
  • Quantitative abnormality of granulocytes
  • T lymphocyte disorder
  • Thong Douglas Ferrante syndrome
  • White blood cell abnormality
  • White blood cell disorder

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Abnormal leukocyte differential NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • leukocyte (cell) (differential) NEC
    • Abnormal, abnormality, abnormalities
      • white blood cells
    • Disease, diseased
      • white blood cells
    • Disorder(of)
      • white blood cells
    • Findings, abnormal, inconclusive, without diagnosis
      • white blood cell (count) (differential) (morphology)

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 D72.9 to ICD-9-CMHistory

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

ICD-9-CM
288.9 Wbc disease NOS
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D72.9Overview

Is D72.9 (Other disorders of white blood cells) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of white blood cells, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D72.9 group to?

When disorder of white blood cells, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 814, 815, 816, with relative weights from 0.6320 to 2.1267 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D72.9?

Under the General Equivalence Mappings, disorder of white blood cells, unspecified converts to ICD-9-CM 288.9 (wbc disease NOS). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.