{"id":"anti-parietal-cell","name":"Anti-Parietal Cell Antibody (APCA)","shortName":"APCA","aliases":["Parietal Cell Antibody","APCA","Anti-Parietal Cell Ab","Gastric Parietal Cell Antibody","Parietal Cell Ab IgG","Gastric Parietal Cell Antibody, IgG","Parietal Cell Antibody, IgG","Anti-Parietal Cell Antibody","Antiparietal Cell Antibody","Anti-Gastric Parietal Cell Antibody","Parietal Cell Antibody Titer","Hydrogen Potassium (H+/K+) ATPase Antibody"],"abbreviations":["APCA"],"loinc":[{"code":"40960-7","primary":true},{"code":"27320-1","primary":false},{"code":"5271-2","primary":false},{"code":"56147-2","primary":false},{"code":"14241-4","primary":false}],"specimen":"serum","units":[{"ucum":"[arb'U]/mL","display":"Units"}],"referenceRanges":[{"population":"Adults","low":0,"high":20,"unit":"[arb'U]/mL","unitDisplay":"Units","note":"Negative cutoff on the ELISA, reported in arbitrary Units: 20.0 or less is negative, 20.1 to 24.9 equivocal and 25.0 or more positive (ARUP, and the same scheme at University of Iowa Hospitals). ARUP prints its reference interval as 24.9 or less, which includes the equivocal zone. Other labs report an immunofluorescence titer with their own cutoff, and kits differ, so use the cutoff and flag printed on your own report.","sources":[{"title":"Gastric Parietal Cell Antibody, IgG (test 0050596)","url":"https://ltd.aruplab.com/Tests/Pub/0050596","publisher":"ARUP Laboratories"},{"title":"Parietal Cell Antibodies, IgG","url":"https://www.healthcare.uiowa.edu/path_handbook/handbook/test3303.html","publisher":"UI Health Care (University of Iowa Hospitals & Clinics) Laboratory Services Handbook"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Antibodies against the cells that make stomach acid. They are linked to autoimmune gastritis and pernicious anemia, but also appear in people who have neither.","url":"https://bloodtesttracker.com/markers/anti-parietal-cell","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}