Cannabinoid:Creatinine Ratio, Urine

CPT: 80307
Print Share

Test Details

Test Includes

Cannabinoids (THC); creatinine; cannabinoid:creatinine ratio


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.



Specimen Requirements


Urine (random)


5 mL

Minimum Volume

1.4 mL


Plastic transport tube or plastic urine container

Storage Instructions

Room temperature

Stability Requirements



Room temperature

7 days


14 days


14 days

Freeze/thaw cycles

Stable x3


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

For Providers

Please login to order a test.


© 2018  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at