2026 ICD-10-CM Diagnosis Code D75.821Non-immune heparin-induced thrombocytopenia

ICD-10-CM Codes›D50–D89›D70-D77›D75

ICD-10-CM D75.821
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D75.821 is a billable ICD-10-CM diagnosis code for non-immune heparin-induced thrombocytopenia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Coagulation and hemorrhagic disorders.

Code Identity

ICD-10-CM Code
D75.821
Billable Status
Yes — Valid for Submission
Code Describes
Non-immune heparin-induced thrombocytopenia
Short Description
Non-immune heparin-induced thrombocytopenia
Same as the full description in the CMS dataset.
Parent Code
D75.82
Heparin induced thrombocytopenia (HIT)

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD70-D77Other disorders of blood and blood-forming organs
CategoryD75Other and unspecified diseases of blood and blood-forming organs
This CodeD75.821Non-immune heparin-induced thrombocytopenia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Non-immune HIT
  • Type 1 heparin-induced thrombocytopenia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Thrombocytopenia, thrombocytopenic
      • heparin-associated
    • Thrombocytopenia, thrombocytopenic
      • heparin induced (HIT)
        • non-immune
    • Thrombocytopenia, thrombocytopenic
      • heparin induced (HIT)
        • type 1

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR BLD006
Coagulation and hemorrhagic disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement D75.821 replaces the following previously assigned code(s):

  • D75.82 - Heparin induced thrombocytopenia (HIT)
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D75.821Overview

Is D75.821 (Heparin induced thrombocytopenia (HIT)) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report non-immune heparin-induced thrombocytopenia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

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.