ICD-10-CM 2027
ICD-10 code for Heparin induced HIT thrombocytopenia
From the official ICD-10-CM alphabetic index entry “Thrombocytopenia, thrombocytopenic › heparin induced (HIT)”. Page updated September 29, 2026.
About coding Heparin induced HIT thrombocytopenia
The ICD-10-CM code for Heparin induced HIT thrombocytopenia is D75.829 (Heparin-induced thrombocytopenia, unspecified). The official index lists 9 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on D75.829.
Within D75.82, choose D75.829 (Heparin-induced thrombocytopenia, unspecified) only when documentation doesn't support a more specific option: Non-immune heparin-induced thrombocytopenia (D75.821), Immune-mediated heparin-induced thrombocytopenia (D75.822) and other heparin-induced thrombocytopenia syndrome (D75.828).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075), DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195) and DRG 813 (Coagulation Disorders, relative weight 1.5257), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Heparin induced HIT thrombocytopenia codes (official index)
- delayed-onset D75.828 — Other heparin-induced thrombocytopenia syndrome
- immune-mediated D75.822 — Immune-mediated heparin-induced thrombocytopenia
- non-immune D75.821 — Non-immune heparin-induced thrombocytopenia
- persisting D75.828 — Other heparin-induced thrombocytopenia syndrome
- syndrome
- autoimmune D75.828 — Other heparin-induced thrombocytopenia syndrome
- specified NEC D75.828 — Other heparin-induced thrombocytopenia syndrome
- spontaneous (without heparin exposure) D75.84 — Other platelet-activating anti-PF4 disorders
- type 1 D75.821 — Non-immune heparin-induced thrombocytopenia
- type 2 D75.822 — Immune-mediated heparin-induced thrombocytopenia
Common questions about Heparin induced HIT thrombocytopenia ICD-10 codes
What is the ICD-10 code for Heparin induced HIT thrombocytopenia?
- D75.829 — Heparin-induced thrombocytopenia, unspecified. More specific codes apply when the documentation supports them: D75.828, D75.822, D75.821, D75.828 and others below.
What is the ICD-10 code for delayed-onset heparin induced hit thrombocytopenia?
- D75.828 — Other heparin-induced thrombocytopenia syndrome.
What is the ICD-10 code for immune-mediated heparin induced hit thrombocytopenia?
- D75.822 — Immune-mediated heparin-induced thrombocytopenia.
What is the ICD-10 code for non-immune heparin induced hit thrombocytopenia?
- D75.821 — Non-immune heparin-induced thrombocytopenia.
What is the ICD-10 code for persisting heparin induced hit thrombocytopenia?
- D75.828 — Other heparin-induced thrombocytopenia syndrome.
What is the ICD-10 code for type 1 heparin induced hit thrombocytopenia?
- D75.821 — Non-immune heparin-induced thrombocytopenia.
What is the ICD-10 code for type 2 heparin induced hit thrombocytopenia?
- D75.822 — Immune-mediated heparin-induced thrombocytopenia.
Is D75.829 billable?
- Yes. D75.829 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D75.829 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D75.829 as a principal diagnosis.
Is D75.829 a CC or MCC?
- No. D75.829 is neither a CC nor an MCC under MS-DRG v44.0.