Turnaround Time: 4 - 6 days
CPT Code:

82157, 82627, 84403

Test Type: 2 mL Serum
Stability Time:



Room temperature

14 days


14 days


14 days

Freeze/thaw cycles

Stable x2


Collection Details:

Collection Instructions:

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.

Red-top tube Do NOT use a gel-barrier tube.

The use of gel- barrier tubes is not recommended due to slow absorption of the steroid by the gel. Transfer separated serum to a plastic transport tube.