Biomarkers · Chemical
Percent Free Cortisol, Serum
A cortisol test measures the level of cortisol in your blood, urine (pee), or saliva (spit). Cortisol is a hormone made by your adrenal glands, two small glands that sit above your kidneys.
- Primary unit
- %
- LOINC codes
- 65364-2
- Tests that measure Percent Free Cortisol, Serum
- Labcorp 1
Tests
Check the catalog code, specimen, method and preparation for every test that measures Percent Free Cortisol, Serum. Select up to five tests to compare them side by side.
Labcorp 1 test
Panels that include this biomarker
Cortisol, Free, Total With CBG (Endocrine Sciences) 500440
3 analytes · Serum · Fasting not stated · Turnaround 6 - 12 days
Labcorp catalog pageMethod and collection
- Method
- HPLC/tandem mass spectrometry; radioimmunoassay (RIA); calculation of free cortisol
- Collection
- Separate serum within one hour of venipuncture. Transfer specimen to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested .
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Check the guidelines, studies and lab catalogs behind every range and link on this page. Open a source to see each claim it backs.
Lab catalogs
Labcorp test menu
Labcorp
Test catalog: 1 tests, with codes, specimens, methods and reference intervals
Reference sources
Cortisol Test
MedlinePlus, National Library of Medicine
The description at the top of this page
Codes and registries
LOINC 65364-2
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for Percent Free Cortisol, Serum
Registered studies that measure Percent Free Cortisol, Serum, on the U.S. National Library of Medicine registry.
Verify these ranges and sources
We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.
Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.
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