myeloproliferative neoplasm polycythemia vera ICD9CM:207.1 A myeloproliferative neoplasm characterized by erythroid hyperplasia, myeloid leukocytosis, thrombocytosis, and splenomegaly. chronic erythremia UMLS_CUI:C0152272 DOID:8997 MESH:D011087 SNOMEDCT_US_2020_03_01:188753004 NCI:C3336 GARD:7422 DOID:11868 ICD9CM:238.4 OMIM mapping confirmed by DO. [SN]. OMIM:263300 Proliferative polycythaemia UMLS_CUI:C0032463 SNOMEDCT_US_2020_03_01:154644004 disease_ontology ICD10CM:D45 Osler-Vaquez syndrome Polycythaemia rubra vera