{"id":"anti-rnp","name":"Anti-U1-RNP Antibody (RNP)","shortName":"Anti-RNP","aliases":["RNP Antibody","Anti-RNP","U1-RNP Antibody","Ribonucleoprotein Antibody","RNP Ab (IgG)","nRNP Antibody","Anti-RNP Antibody","RNP Antibody, IgG","Anti-U1 RNP","U1 snRNP Antibody","U1-RNP Ab","RNP Ab","Ribonucleoprotein Antibody, IgG","Anti-nRNP","ENA RNP Ab","ENA RNP Antibody","RNP Antibody IgG"],"abbreviations":["Anti-RNP","U1-RNP","nRNP"],"loinc":[{"code":"29958-6","primary":true},{"code":"29374-6","primary":false},{"code":"31588-7","primary":false},{"code":"51928-0","primary":false}],"specimen":"serum","units":[{"ucum":"[arb'U]/mL","display":"AU/mL"}],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Looks for antibodies to U1-RNP. They are most closely linked with mixed connective tissue disease and can also appear in lupus and related conditions.","url":"https://bloodtesttracker.com/markers/anti-rnp","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}