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Test Code FFTCC THC Confirmation, MS, SP

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)

Reporting Name

THC Confirmation, MS, SP

Specimen Type


Specimen Required

Submit only 1 of the following specimens:



Draw blood in a plain, red-top tube(s), serum gel tube is not acceptable. Spin down and send 5 mL of serum refrigerated in plastic vial.



Draw blood in a green-top (sodium heparin) tube(s), plasma gel tube is not acceptable. Spin down and send 5 mL sodium heparin plasma refrigerated in plastic vial.

Specimen Minimum Volume

2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Refrigerated (preferred) 14 days
  Frozen  180 days

Reject Due To

Hemolysis NA
Lipemia NA
Icterus NA
Other plasma gel tube; SST tube

Reference Values



Units: ng/mL


Test Performed by:       Medtox Laboratories, Inc.

                                    402 W. County Road D

                                    St. Paul, MN 55112

Day(s) Performed

Monday through Sunday

Report Available

5 to 9 days

Performing Laboratory

Medtox Laboratories, Inc.

Test Classification

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FFTCC THC Confirmation, MS, SP 16542-3


Result ID Test Result Name Result LOINC Value
Z4770 Cannabinoids 48943-5
Z4771 Tetrahydrocannabinol (THC) 73935-9
Z4772 Carboxy-THC 48944-3
Z4773 Hydroxy-THC 48934-4
Z4774 Cannabinol 87379-4
Z4775 Cannabidiol 82964-8