ICD-10 Code D75.84 – Other platelet-activating anti-PF4 disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D75.84 – Other platelet-activating anti-PF4 disorders
What it is
D75.84 identifies other disorders caused by platelet-activating antibodies against PF4. Use it for immune-mediated conditions where anti-PF4 activity is documented, but the case does not fit a more specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. These disorders are generally recognized by thrombosis, low platelet count, or both, with evidence of platelet-activating anti-PF4 antibodies.
When to use this code
Use this code when the provider documents an anti-PF4 platelet-activating disorder and does not specify a more exact category. It may apply when the record describes a related immune thrombotic syndrome but leaves the final subtype unclear. Code only when the diagnosis is established in the chart.
Do not use for
Do not use this code for routine thrombocytopenia, isolated thrombosis, or suspected anti-PF4 disease without confirmation. Check documentation if the record instead names a more specific platelet disorder.
Coding tip
Look for explicit provider wording linking anti-PF4 antibodies to platelet activation before assigning D75.84.