ICD-10 Code D47.3 – Essential (hemorrhagic) thrombocythemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D47.3 – Essential (hemorrhagic) thrombocythemia
What it is
D47.3 identifies essential thrombocythemia, a chronic myeloproliferative disorder in which the bone marrow makes too many platelets. Use this code when the record specifically documents essential or hemorrhagic thrombocythemia.
Clinical signs
Clinical features may include persistent thrombocytosis, microvascular symptoms, or thrombotic or bleeding complications. Clinical features vary; refer to documentation for the confirmed diagnosis and any associated manifestations.
When to use this code
Use D47.3 when the provider documents essential thrombocythemia, primary thrombocythemia, or hemorrhagic thrombocythemia as the diagnosis. It may also support coding when the condition is being followed as an established chronic disorder. If the chart only notes elevated platelets without a confirmed diagnosis, check documentation.
Do not use for
Do not use this code for reactive or secondary thrombocytosis, which has a different cause. Also avoid it when thrombocytosis is mentioned only as a lab finding and no essential thrombocythemia diagnosis is documented.
Coding tip
Confirm the provider’s exact wording, because “thrombocytosis” alone is not enough for D47.3.