{"id":"lp-pla2-activity","name":"Lp-PLA2 Activity","shortName":"Lp-PLA2","aliases":["LP-PLA2","Lipoprotein-Associated Phospholipase A2 Activity","PLAC Activity","LpPLA2","Lipoprotein-associated PLA2","Lp-PLA2 Activity","PLAC Test","PLAC Test (Lp-PLA2)","Cardio IQ Lp-PLA2 Activity","Platelet-Activating Factor Acetylhydrolase","PAF-AH","Lp-PLA2 (Activity)"],"abbreviations":["Lp-PLA2","PAF-AH"],"loinc":[{"code":"86951-1","primary":true}],"specimen":"serum-or-plasma","units":[{"ucum":"nmol/min/mL","display":"nmol/min/mL"}],"referenceRanges":[{"population":"Adults","low":null,"high":123,"unit":"nmol/min/mL","unitDisplay":"nmol/min/mL","note":"This is Quest's cutoff: 'optimal' at 123 nmol/min/mL or below and 'high' above 123 (Quest Cardio IQ Lp-PLA2 Activity, as listed by Fullscript). Labcorp's PLAC test uses a different assay and a much higher cutoff (reduced risk below 225, increased risk 225 or above), so the numbers can't be swapped. Check which lab ran your test and use the range on your own report. Both are risk cutoffs, not the central 95% of healthy people.","sources":[{"title":"Lp-PLA2 Activity, Quest Diagnostics (reference range as listed by Fullscript)","url":"https://us.fullscript.com/labs/quest/lp-pla2-activity","publisher":"Quest Diagnostics (via Fullscript)"}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"How active an enzyme is that travels mostly on LDL particles and is found in artery plaque. Higher activity is linked to higher heart risk, but it is an add-on test.","url":"https://bloodtesttracker.com/markers/lp-pla2-activity","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}