{"id":"anti-hbc-igm","name":"Hepatitis B Core Antibody, IgM","shortName":"Anti-HBc IgM","aliases":["Anti-HBc IgM","HBc IgM","Hep B Core IgM","HBcAb IgM","Hepatitis B Core IgM Antibody","Hepatitis B Core Antibody, IgM","Hepatitis B Virus Core IgM Antibody","HBc IgM Ab","IgM Anti-HBc","Hep B Core Ab IgM","HBV core IgM","IgM anti-hepatitis B core antibody"],"abbreviations":["Anti-HBc IgM","IgM anti-HBc","HBc IgM"],"loinc":[{"code":"24113-3","primary":true},{"code":"31204-1","primary":false},{"code":"5185-4","primary":false}],"specimen":"serum-or-plasma","units":[],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A short-lived antibody that appears early in a new hepatitis B infection. A positive result is linked to infection within roughly the past six months.","url":"https://bloodtesttracker.com/markers/anti-hbc-igm","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}