Tetrahydrocannabinol (THC, marijuana), Screen with Confirmation, serum

TEST: 700834
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CPT: 80307
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Synonyms

Marijuana; THC; Mary Jane; Reefer

Expected Turnaround Time

5 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Information

In-house validated method

Specimen Requirements

Specimen

Serum

Volume

7 mL

Minimum Volume

3 mL

Container

Red-top (no additive) tube. Gel-barrier tubes are not recommended.

Collection

Transfer separated serum to a plastic transport tube.

Storage Instructions

Submission/transport (<3 days): Refrigerate. For storage beyond three days, specimen should be frozen.

Test Details

Use

Detect use of THC, a psychoactive drug

Methodology

Initial presumptive testing by immunoassay at a testing threshold of 5 ng/mL; presumptive positives confirmed to limit of quantitation by definitive liquid chromatography/tandem mass spectrometry (LC/MS-MS)