ICD-10 D75.821
Billable / Specific HCC v28: 48Non-immune heparin-induced thrombocytopenia
About ICD-10-CM D75.821
ICD-10-CM code D75.821 represents Non-immune heparin-induced thrombocytopenia. This is a billable/specific code in the Blood and Blood-forming Organs chapter (block D75). The 2026 edition of ICD-10-CM D75.821 became effective on October 1, 2025.
Coding Tips for D75.821
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
D75.821 is a CMS-HCC v28 risk-adjustment code (category 48). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under D75.821. Per CMS ICD-10-CM Tabular 2026.
- Non-immune HIT
- Type 1 heparin-induced thrombocytopenia
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Medicare LCD Coverage for D75.821
Local Coverage Determinations (LCDs) from CMS MACs that list D75.821 as a covered diagnosis.
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Commercial Payer Coverage
Coverage policies from major commercial payers referencing D75.821.
4 Medicare
CPT Codes Commonly Billed with D75.821
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93990 CMS LCD: Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies CMS LCD
- 93985 CMS LCD: Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies CMS LCD
- 93986 CMS LCD: Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies CMS LCD
Codes Adjacent To D75.821
Other codes in section D70-D77 (Other disorders of blood and blood-forming organs).
ICD-10 D75.821, Billing FAQ
Is ICD-10 code D75.821 billable? +
Yes, D75.821 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to D75.821? +
ICD-10 D75.821 includes: Non-immune HIT; Type 1 heparin-induced thrombocytopenia.
Does D75.821 affect Medicare Advantage HCC risk adjustment? +
Yes. D75.821 maps to CMS-HCC v28 category 48. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with D75.821? +
Procedures frequently paired with D75.821 include: 93990, 93985, 93986.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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