{"id":"pth","name":"Parathyroid Hormone (PTH), Intact","shortName":"PTH","aliases":["PTH","Parathyroid Hormone","PTH, Intact","iPTH","Intact PTH","Parathyroid Hormone, Intact","PTH, Intact and Calcium","Parathormone","Parathyroid Hormone (PTH), Intact","PTH Intact","Intact Parathyroid Hormone","PTH-Intact","PTH, Intact, Serum","PTH, Intact, Plasma","PTH, Intact without Calcium","PTH Intact Molecule","Parathyrin, Intact","Hormona paratiroidea (PTH)","PTH intacta","Parathormon"],"abbreviations":["PTH","iPTH"],"loinc":[{"code":"2731-8","primary":true},{"code":"14866-8","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"pg/mL","display":"pg/mL"},{"ucum":"pmol/L","display":"pmol/L"}],"referenceRanges":[{"population":"18+","low":18,"high":59,"unit":"pg/mL","unitDisplay":"pg/mL","note":"ARUP Laboratories' adult interval (18 years and older, electrochemiluminescence immunoassay), which is close to the 17.9-58.6 pg/mL that Roche reported for its Elecsys PTH immunoassay in an FDA submission (141 apparently healthy donors, 2.5th to 97.5th percentiles). Older intervals are still in use: 15-65 pg/mL (1.6-6.9 pmol/L) on an earlier Roche Cobas setup (a 2020 JCEM study) and 10-65 pg/mL on MedlinePlus. ARUP's interval reflects people with normal calcium and phosphate and optimal vitamin D. PTH assays do not agree with each other, so use the range printed on your own report.","sources":[{"title":"Parathyroid Hormone, Intact (test 0070346)","url":"https://ltd.aruplab.com/Tests/Pub/0070346","publisher":"ARUP Laboratories"},{"title":"510(k) Decision Summary: Elecsys PTH and Elecsys PTH STAT (K231927)","url":"https://www.accessdata.fda.gov/cdrh_docs/reviews/K231927.pdf","publisher":"U.S. Food and Drug Administration"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A hormone from four small glands in your neck that keeps your blood calcium steady. It is read together with calcium and vitamin D.","url":"https://bloodtesttracker.com/markers/pth","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}