Laboratory Services
Cortisol, Random
Print this pageUpdated Test Information:
| Test Description |
Cortisol, Random
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|---|---|---|
| Test ID |
COR
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| General Information |
Establish the diagnosis of adrenocortical insufficiency, Addison's disease, adrenocortical hypersecretion, Cushing's syndrome. Malfunction of the organs in the hypothalamic-pituitary-adrenal cortex axis will result in alteration of the cortisol levels.
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| Specimen Type |
Serum
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| Alternate Specimen Type |
Red, Li-heparin plasma
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| Specimen Requirements |
SST
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| Specimen Collection / Processing Instructions |
SST - Due to the circadian rhythm of cortisol levels in serum and plasma, the sample collection time must be noted.
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| Minimum Sample Volume |
1 mL
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| Pediatric Min. Volume (if applicable) |
500 uL
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| Additional Processing Details |
Due to the circadian rhythm of cortisol levels in serum and plasma, the sample collection time must be noted.
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| Stability |
24 hours at 20-25˚C
4 days at 2-8˚C 12 months at -20˚C. Freeze only once. |
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| Unacceptable Specimen Conditions |
Citrate plasma samples
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| Limitations |
This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
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| Methodology |
Electrochemiluminescence immunoassay ECLIA
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| Estimated TAT |
0-2 days
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| Testing Schedule |
Monday-Saturday
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| CPT Code(s) |
82533
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| Reference Range |
6-10 am: 4.82-19.5 ug/dL
4-8 pm: 2.47-11.9 ug/dL |
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| Performing Lab |
Incyte Diagnostics
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| LOINC Code(s) |
2143-6
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