D69.51 ICD-10-CM Code: Posttransfusion purpura
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) / Coagulation defects, purpura and other hemorrhagic conditions (D65-D69)
D69.51
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidancePosttransfusion purpura
A temporary drop in platelet count that occurs after receiving a blood transfusion, usually resolving within days.
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- Posttransfusion purpura from whole blood (fresh) or blood products
- PTP
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D69.51 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D69.51 in this effective period.
Excludes 1
Official- heparin induced thrombocytopenia (HIT) (D75.82-)
- transient thrombocytopenia of newborn (P61.0)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D69.51 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D69.51 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D69.51 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 D69.51 an HCC code?
No. D69.51 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
D69.51 is the ICD-10-CM diagnosis code for posttransfusion purpura. A temporary drop in platelet count that occurs after receiving a blood transfusion, usually resolving within days. D69.51 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 coagulation defects, purpura and other hemorrhagic conditions (d65-d69).
D69.51 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.
Document the date of transfusion and timing of platelet count drop.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D69.51 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the date of transfusion and timing of platelet count drop
- •Confirm other causes of thrombocytopenia have been ruled out