2026 ICD-10-CM Diagnosis Code D72.819Decreased white blood cell count, unspecified
ICD-10-CM Codes›D50–D89›D70-D77›D72
- Billable — Valid for Submission
- Not Chronic
D72.819 is a billable ICD-10-CM diagnosis code for decreased white blood cell count, 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. Coders also document this condition as blood leukocyte number below reference range. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diseases of white blood cells.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Blood leukocyte number below reference range
- Leukopenia
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Decreased leukocytes, unspecified
- Leukocytopenia, unspecified
- Leukopenia
Type 1 Excludes
- malignant leukopenia D70.9
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- leukocytes - D72.819
- white blood cell count - D72.819
- Leukocytopenia - D72.819
- Leukopenia - D72.819
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Decrease(d)
- leukocytes
- Decrease(d)
- white blood cell count
- Leukocytopenia
- Leukopenia
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Leukopenia
a decrease in the number of leukocytes in a blood sample below the normal range (leukocyte count less than 4000).
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 D72.819 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D72.819Overview
Is D72.819 (Decreased white blood cell count) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report decreased white blood cell count, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D72.819 group to?
When decreased white blood cell count, 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 D72.819?
Under the General Equivalence Mappings, decreased white blood cell count, unspecified converts to ICD-9-CM 288.50 (leukocytopenia NOS). The mapping is approximate, so confirm the match fits the documentation.
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.
