{"id":"prothrombin-g20210a","name":"Prothrombin G20210A (Factor II)","shortName":"Prothrombin G20210A","aliases":["Prothrombin G20210A","Prothrombin Gene Mutation","Factor II Mutation","Factor II G20210A","Prothrombin 20210","F2 G20210A","F2 20210G>A","Prothrombin Gene G20210A","Prothrombin (Factor II) G20210A","Prothrombin 20210A","Factor II 20210","Prothrombin Gene Mutation (Factor II)","F2 c.*97G>A","rs1799963","Factor II (Prothrombin) Mutation","Prothrombin Mutation","Prothrombin Gene Mutation Analysis","Factor II, DNA Analysis"],"abbreviations":["G20210A","PGM"],"loinc":[{"code":"24475-6","primary":true},{"code":"24476-4","primary":false}],"specimen":"whole-blood","units":[],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A DNA test for a common inherited change in the F2 gene that lets blood clot a little more easily. Most people who carry it never have a problem clot.","url":"https://bloodtesttracker.com/markers/prothrombin-g20210a","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}