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Test Code UTHC Delta-8 and Delta-9-Carboxy-Tetrahydrocannabinol (THC) Confirmation, Random, Urine

Important Note

  • This test may not be individually ordered.
  • It is intended as confirmatory testing following the results of a Urine Drug Screen (UDRG).
  • To order use the Add Lab Test form (NextGen clients).

Reporting Name

Carboxy-THC Confirmation, U

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Detection and confirmation of drug use of cannabis/marijuana and to specifically identify and quantify delta-8-carboxy tetrahydrocannabinol (THC-COOH) and delta-9-THC-COOH


Ordering Guidance


For situations where chain of custody is required, a Chain-of-Custody Kit (T282) is available. For chain-of-custody testing, order THCX / Delta-8 and Delta-9-Carboxy-Tetrahydrocannabinol (THC) Confirmation, Chain of Custody, Random, Urine

 

Additional drug panels and specific requests are available. Call 800-533-1710 or 507-266-5700.



Additional Testing Requirements


If urine creatinine is required or adulteration of the sample is suspected, order, ADULT / Adulterants Survey, Random, Urine.



Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container Tube: Plastic urine container

Submission Container/Tube: Plastic, 5-mL tube

Specimen Volume: 3 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

Additional Information:

1. No specimen substitutions.

2. STAT requests are not accepted for this test.


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  72 hours

Specimen Type

Urine

Day(s) Performed

Monday through Friday

Reference Values

Not Detected

 

Cutoff concentration:

DELTA-8 CARBOXY-TETRAHYDROCANNABINOL (THC) by LC-MS/MS: <5.0 ng/mL

DELTA-9 CARBOXY-TETRAHYDROCANNABINOL (THC) by LC-MS/MS: <5.0 ng/mL

Method Name

Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

80349

G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
THCU Carboxy-THC Confirmation, U 20521-1

 

Result ID Test Result Name Result LOINC Value
618770 Delta-8 Carboxy-Tetrahydrocannabinol by LC-MS/MS 20521-1
2497 Delta-9 Carboxy-Tetrahydrocannabinol by LC-MS/MS 20521-1
21186 Carboxy-THC Interpretation 69050-3

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-General Request (T239)

-Therapeutics Test Request (T831)

Report Available

3 to 5 days