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HelpTest Code THCCR Delta 9-Carboxy-Tetrahydrocannabinol (THC-COOH) Confirmation and Creatinine Ratio, Random, Urine
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Collection Container/Tube: Plastic urine container
Submission Container/Tube: 10-mL urine tube
Specimen Volume: 10 mL
Collection Instructions:
1. Collect a random urine specimen.
2. Submit 10 mL in a plastic container.
3. No preservative.
Additional Information:
1. No specimen substitutions.
2. Submitting less than 10 mL may compromise the ability to perform all necessary testing.
3. STAT requests are not accepted for this test.
Specimen Type
UrineSpecimen Minimum Volume
6 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 14 days |
| Frozen | 14 days | |
| Ambient | 72 hours |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
CARBOXY-TETRAHYDROCANNABINOL (THC):
Not Detected (Positive result is reported with a quantitative result.)
Cutoff concentration by liquid chromatography tandem mass spectrometry:
DELTA-9 CARBOXY-TETRAHYDROCANNABINOL: 5.0 ng/mL
CREATININE:
≥18 years old: 16-326 mg/dL
Reference values have not been established for patients who are younger than 18 years.
Day(s) Performed
Monday through Sunday
Report Available
2 to 4 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
G0480
82570 (if appropriate for select payers)
80349 (if appropriate for select payers)