THC (Marijuana) Confirmation
Label Mnemonic: THCC
Epic code: LAB447
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mailout Laboratory
6240-8 RCP
Random Urine
Collection Medium:
Yellow top round bottom tube (no additive)
Preferred Minimum: 1 mL random urine
Absolute Minimum: 0.5 mL random urine
Rejection Criteria:
Specimens exposed to repeated freeze/thaw cycles. Test cannot be added to a urine sample previously utilized for urinalysis testing (LAB1160, LAB1164, LAB8379).
Turn Around Time:
1-4 days upon receipt at reference laboratory
Reference Range:
11-Nor-9-carboxy-THC - 15 ng/mL
Interpretive Data:
Drugs covered: 9-carboxy-THC

Positive cutoff: 15 ng/mL

The drug analyte detected in this assay, 9-carboxy THC, is a metabolite of delta-9-tetrahydrocannabinol (THC). Detection of 9-carboxy THC suggests use of, or exposure to, a product containing THC. This test cannot distinguish between prescribed or non-prescribed forms of THC, nor can it distinguish between active or passive use. The 9-carboxy THC metabolite can be detected in urine for several weeks. Normalization of results to creatinine concentration can help document elimination or suggest recent use, when specimens are collected at least one week apart.

For medical purposes only; not valid for forensic use.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
CPT Code: