ICD-10 Code D75.82 – Heparin induced thrombocytopenia (HIT) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D75.82 – Heparin induced thrombocytopenia (HIT)
What it is
D75.82 identifies heparin-induced thrombocytopenia, an immune-mediated reaction to heparin that causes a platelet count drop and can increase clot risk. Use it when the record clearly documents HIT.
Clinical signs
Typical findings include thrombocytopenia after heparin exposure, new thrombosis, or both. Clinical features vary; refer to documentation, and confirm that the provider has diagnosed HIT.
When to use this code
Use this code when the clinician documents HIT, heparin allergy with immune thrombocytopenia, or HIT-related thrombosis. It may apply during inpatient or outpatient care if the diagnosis is established in the chart.
Code it only when the condition is current or being actively evaluated as HIT. If the note only says low platelets after heparin without a diagnosis, check documentation.
Do not use for
Do not use D75.82 for simple heparin exposure, routine anticoagulation monitoring, or thrombocytopenia from another cause. Check documentation if the record does not clearly link the platelet drop to heparin.
Coding tip
Look for explicit provider wording of HIT or heparin-induced thrombocytopenia before assigning D75.82.