Cannabinoid:Creatinine Ratio, Urine

CPT: 80307
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Test Details

Test Includes

Cannabinoids (THC); creatinine; cannabinoid:creatinine ratio

Use

Cannabinoid concentration is normalized using creatinine to correct for diurnal fluctuations in fluid intake and urine output. The normalized cannabinoid concentration can be used to monitor compliance with drug treatment programs. Serial determinations should be done at two- to three-day intervals. A 50% increase over the previous result is strong indication of continued marijuana use.

Methodology

Immunoassay

Specimen Requirements

Specimen

Urine (random)

Volume

5 mL

Minimum Volume

1.4 mL

Container

Plastic transport tube or plastic urine container

Storage Instructions

Room temperature

Stability Requirements

Temperature

Period

Room temperature

7 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
070409 Cannabinoid/Creatinine Ratio 070410 Cannabinoids Quant, Urine ng/mL 19073-6
070409 Cannabinoid/Creatinine Ratio 075003 Creatinine, Urine mg/mL 2161-8
070409 Cannabinoid/Creatinine Ratio 075004 Cannab/Crt Ratio ng/mg creat 13478-3

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