What is too high a count for blood platelets?

A normal platelet count typically ranges from 150,000 to 450,000 platelets per microliter of blood. A count above 450,000 is considered thrombocytosis, which can increase the risk of blood clots and other complications. Counts exceeding 1,000,000 platelets per microliter are generally viewed as significantly high and may require medical evaluation to determine the underlying cause and appropriate management.