Platelet count >1,000 x 10^9/L as screening threshold
Coding and classification
ICD-10 coding
D47.3 Essential (hemorrhagic) thrombocythemia
Primary diagnosis code
Used for both new and established ET
Associated complication codes
I63 range for ischemic stroke
I82 range for deep vein thrombosis
K75.1 for phlebitis of portal vein
SNOMED CT
Essential thrombocythemia disorder concept
Maps to molecular driver subtypes
Used in structured clinical documentation
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