{"id":"anti-ssa-ro","name":"Anti-SSA/Ro Antibody","shortName":"Anti-SSA/Ro","aliases":["SS-A Antibody","SSA Antibody","Anti-SSA","Ro Antibody","Sjogren's Antibody (SS-A)","Sjogrens Syndrome-A Ab","Anti-Ro","Ro (SS-A) Antibody","Ro/SSA Antibody","SS-A/Ro Antibody","Anti-Ro/SSA","SSA/Ro Ab","SSA (Ro) (ENA) Antibody, IgG","Anti-SSA (Ro)","SS-A (Ro) Antibody IgG","Ro Antibody IgG","Sjogren's Syndrome A Antibody"],"abbreviations":["SSA","SS-A","Anti-Ro","Anti-SSA"],"loinc":[{"code":"17792-3","primary":true},{"code":"29964-4","primary":false},{"code":"33610-7","primary":false},{"code":"33569-5","primary":false}],"specimen":"serum","units":[{"ucum":"[arb'U]/mL","display":"AU/mL"}],"referenceRanges":[{"population":"Adults","low":0,"high":40,"unit":"[arb'U]/mL","unitDisplay":"AU/mL","note":"ARUP Laboratories multiplex bead assay, reported in AU/mL (arbitrary units), with a reference interval of 40 or less. ARUP reads 29 or less as negative, 30 to 40 as equivocal and 41 or more as positive. Units and cutoffs are specific to each kit and are not interchangeable (other labs report antibody index or chemiluminescent units with different cutoffs), so use the cutoff and flag printed on your own report. ARUP reports Ro52 and Ro60 separately, each with this cutoff, and does not report a combined SSA number, so apply it to either component and not to a sum. Mayo Clinic Laboratories reports each in chemiluminescent units (CU) with a cutoff of 20, and the University of Mississippi Medical Center reports SSA in IU with a negative cutoff below 25.","sources":[{"title":"Extractable Nuclear Antigen Antibodies (SSA 52, SSA 60, and SSB) (test 0050791)","url":"https://ltd.aruplab.com/Tests/Pub/0050791","publisher":"ARUP Laboratories"},{"title":"Sjogren's Syndrome A (SSA) Antibody (Ro)","url":"https://umc.edu/som/Departments%20and%20Offices/SOM%20Departments/Pathology/UMMC%20LAb%20Services/Lab%20Test%20List/Laboratory/Tests/Sjogrens-Syndrome-A--SSA--Antibody--Ro-.html","publisher":"University of Mississippi Medical Center Laboratory Services"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Looks for antibodies to the Ro (SSA) protein. They are common in Sjögren's disease and lupus, and they matter for pregnancy planning.","url":"https://bloodtesttracker.com/markers/anti-ssa-ro","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}