D72.819 ICD-10-CM Code: Decreased white blood cell count, unspecified
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FY 2026 Apr update / Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) / Other disorders of blood and blood-forming organs (D70-D77)
D72.819
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceDecreased white blood cell count, unspecified
A decrease in the total number of white blood cells in the blood without a specified cause or type. This is a general code used when the specific reason for low white blood cells is not documented.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Decreased leukocytes, unspecified
- Leukocytopenia, unspecified
- Leukopenia
Excludes 2
Official- neutropenia (D70)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D72.819 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for D72.819 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D72.819 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D72.819 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D72.819 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is D72.819 an HCC code?
No. D72.819 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
D72.819 is the ICD-10-CM diagnosis code for decreased white blood cell count, unspecified. A decrease in the total number of white blood cells in the blood without a specified cause or type. This is a general code used when the specific reason for low white blood cells is not documented. D72.819 sits in the ICD-10-CM chapter for diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (d50-d89), within the section covering other disorders of blood and blood-forming organs (d70-d77).
D72.819 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This is an unspecified code; use only when the type of decreased WBC cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D72.819 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This is an unspecified code; use only when the type of decreased WBC cannot be determined from documentation
- •Query the provider if more specific information about the cause or type of leukopenia is available