{"id":"calcium","name":"Calcium, Total","shortName":"Calcium","aliases":["Calcium","Ca","Calcium, Serum","Total Calcium","Serum calcium","Calcio","Calcium, Total","Calcium, Total, Serum","Calcium, Total, S","Calcium Total","Calcium (Total)","Ca, Total","Calcium Level","Calcémie","Kalzium"],"abbreviations":["Ca","Ca total"],"loinc":[{"code":"17861-6","primary":true},{"code":"2000-8","primary":false},{"code":"49765-1","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"mmol/L","display":"mmol/L"},{"ucum":"mg/L","display":"mg/L"},{"ucum":"meq/L","display":"mEq/L"}],"referenceRanges":[{"population":"18–59","low":8.7,"high":10.2,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp prints 8.7–10.2 mg/dL (about 2.17–2.54 mmol/L) for ages 18 to 59, for men and women alike. Mayo Clinic Laboratories prints 8.6–10.0 for ages 18 to 59 and 8.8–10.2 for 60 and older, with no sex split. The Merck Manual lists 8.8–10.4 mg/dL (2.20–2.60 mmol/L) for adults. Intervals differ by lab and method, so use the range printed on your own report first.","sources":[{"title":"Calcium (test 001016)","url":"https://www.labcorp.com/tests/001016/calcium","publisher":"Labcorp"},{"title":"Calcium, Total, Serum (test ID CA)","url":"https://www.mayocliniclabs.com/test-catalog/overview/601514","publisher":"Mayo Clinic Laboratories"},{"title":"Overview of Disorders of Calcium Concentration","url":"https://www.merckmanuals.com/professional/endocrine-and-metabolic-disorders/electrolyte-disorders/overview-of-disorders-of-calcium-concentration","publisher":"Merck Manual Professional Edition","year":2025}]},{"population":"Men, 60+","low":8.6,"high":10.2,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp interval for men over 59. Mayo Clinic Laboratories prints 8.8–10.2 mg/dL for everyone aged 60 and older.","sources":[{"title":"Calcium (test 001016)","url":"https://www.labcorp.com/tests/001016/calcium","publisher":"Labcorp"},{"title":"Calcium, Total, Serum (test ID CA)","url":"https://www.mayocliniclabs.com/test-catalog/overview/601514","publisher":"Mayo Clinic Laboratories"}]},{"population":"Women, 60+","low":8.7,"high":10.3,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp interval for women over 59. Mayo Clinic Laboratories prints 8.8–10.2 mg/dL for everyone aged 60 and older.","sources":[{"title":"Calcium (test 001016)","url":"https://www.labcorp.com/tests/001016/calcium","publisher":"Labcorp"},{"title":"Calcium, Total, Serum (test ID CA)","url":"https://www.mayocliniclabs.com/test-catalog/overview/601514","publisher":"Mayo Clinic Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Total calcium is the amount of calcium in your blood. It supports your nerves, muscles, heart and bones, and it is on most routine panels.","url":"https://bloodtesttracker.com/markers/calcium","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}