ICD-10 Code D75.822 – Immune-mediated heparin-induced thrombocytopenia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D75.822 – Immune-mediated heparin-induced thrombocytopenia
What it is
D75.822 identifies immune-mediated heparin-induced thrombocytopenia, a condition where heparin triggers an immune reaction that lowers platelet counts. It is a serious adverse drug reaction that can also increase clotting risk.
Clinical signs
Common findings include a platelet drop after heparin exposure, especially when the timing fits recent treatment. Clinical features vary; refer to documentation for thrombosis, skin lesions, or other heparin-related complications.
When to use this code
Use this code when the provider documents immune-mediated HIT, heparin-induced thrombocytopenia, or HIT type 2. It applies when the diagnosis is confirmed or strongly supported in the record during or after heparin use. Check documentation if the note only says thrombocytopenia without linking it to heparin.
Do not use for
Do not use this code for non-immune thrombocytopenia, unspecified low platelets, or a history of heparin exposure without HIT. If the record does not clearly connect the condition to heparin, check documentation.
Coding tip
Look for explicit provider wording that links thrombocytopenia to heparin and distinguishes immune-mediated HIT from other causes.