{"id":"anti-ccp","name":"Anti-CCP (Cyclic Citrullinated Peptide) Antibody","shortName":"Anti-CCP","aliases":["Anti-CCP","Cyclic Citrullinated Peptide Antibody","CCP Antibody","CCP Antibodies, IgG","CCP IgG","Anti-CCP IgG","CCP Ab","CCP IgG/IgA","CCP antibodies","ACPA","Cyclic Citrullinated Peptide (CCP) Antibody (IgG)","Cyclic Citrullinated Peptide Antibody, IgG and IgA","Cyclic Citrullinated Peptide Antibodies, IgG","Cyclic Citrullinated Peptide Ab","Anti-Cyclic Citrullinated Peptide (CCP) Antibody IgG","Anti-citrullinated protein antibody","Anti-CCP Ab"],"abbreviations":["CCP","anti-CCP","ACPA"],"loinc":[{"code":"33935-8","primary":true},{"code":"57093-7","primary":false},{"code":"94874-5","primary":false},{"code":"53027-9","primary":false}],"specimen":"serum","units":[{"ucum":"[arb'U]/mL","display":"U/mL"}],"referenceRanges":[{"population":"Adults","low":0,"high":19.9,"unit":"[arb'U]/mL","unitDisplay":"U/mL","note":"Negative is below 20 U at Mayo Clinic Laboratories, Quest and ARUP. Cutoffs are assay-specific: there is no common international standard for these tests, and other manufacturers use different units and cutoffs. Use the cutoff and flag printed on your own report.","sources":[{"title":"Rheumatoid Arthritis Panel, Serum (test RAPAN, including CCP)","url":"https://www.testcatalog.org/show/RAPAN","publisher":"Mayo Clinic Laboratories"},{"title":"Cyclic Citrullinated Peptide (CCP) Antibody (IgG) (test code 11173)","url":"https://testdirectory.questdiagnostics.com/test/test-detail/11173?cc=MASTER","publisher":"Quest Diagnostics"},{"title":"Cyclic Citrullinated Peptide Antibody, IgG and IgA (test 3016632)","url":"https://ltd.aruplab.com/Tests/Pub/3016632","publisher":"ARUP Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures antibodies against citrullinated proteins. A positive result is closely linked to rheumatoid arthritis and can appear years before joint symptoms.","url":"https://bloodtesttracker.com/markers/anti-ccp","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}