{"id":"bnp","name":"BNP (B-Type Natriuretic Peptide)","shortName":"BNP","aliases":["B-Type Natriuretic Peptide","BNP","Brain Natriuretic Peptide","BNP, Plasma","Natriuretic Peptide B","BNP (B-Natriuretic Peptide)","B-Type Natriuretic Peptide (BNP)","Brain Natriuretic Peptide, Plasma","BNP B-Type Natriuretic Peptide","BNP (Brain Natriuretic Peptide)","Péptido natriurético tipo B","Natriuretic peptide B-type"],"abbreviations":["BNP"],"loinc":[{"code":"30934-4","primary":true},{"code":"42637-9","primary":false},{"code":"47092-2","primary":false}],"specimen":"plasma","units":[{"ucum":"pg/mL","display":"pg/mL"},{"ucum":"ng/L","display":"ng/L"},{"ucum":"pmol/L","display":"pmol/L"}],"referenceRanges":[{"population":"Adults","low":null,"high":99.9,"unit":"pg/mL","unitDisplay":"pg/mL","note":"A single cutoff of 100 pg/mL (same number as ng/L) is the one most reports use. Cleveland Clinic and Pathology Tests Explained say under 100, and UW Medicine's in-house assay prints under 101. It is stored as 99.9 so a result of exactly 100 falls outside. This is a clinical decision cutoff for people with symptoms, not the central 95% of healthy people. Levels run higher with age and in women and lower with obesity, and lab reference limits are assay-specific (Redfield 2002; Wang 2004), so check the range printed on your own report. For people without an acute illness, the 2021 ESC heart failure guideline uses a lower rule-out threshold of 35 pg/mL (see the bands).","sources":[{"title":"B-Type Natriuretic Peptide (BNAP), UW Medicine Laboratory Test Guide","url":"https://testguide.labmed.uw.edu/view/BNAP","publisher":"University of Washington Medicine, Department of Laboratory Medicine and Pathology"},{"title":"B-Type Natriuretic Peptide (BNP) Test: Normal Levels & Purpose","url":"https://my.clevelandclinic.org/health/diagnostics/22629-b-type-natriuretic-peptide","publisher":"Cleveland Clinic","year":2025},{"title":"BNP and NT-proBNP tests","url":"https://ptex.au/ptests-pro.php?q=BNP","publisher":"Pathology Tests Explained (Royal College of Pathologists of Australasia)","year":2026},{"title":"Rapid measurement of B-type natriuretic peptide in the emergency diagnosis of heart failure","url":"https://pubmed.ncbi.nlm.nih.gov/12124404/","publisher":"New England Journal of Medicine","year":2002},{"title":"Plasma brain natriuretic peptide concentration: impact of age and gender","url":"https://pubmed.ncbi.nlm.nih.gov/12225726/","publisher":"Journal of the American College of Cardiology","year":2002},{"title":"Impact of obesity on plasma natriuretic peptide levels","url":"https://pubmed.ncbi.nlm.nih.gov/14769680/","publisher":"Circulation","year":2004}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A hormone your heart releases when it is stretched. It helps clinicians judge whether symptoms like shortness of breath could be from heart failure.","url":"https://bloodtesttracker.com/markers/bnp","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}