Lab Test

Cannabinoids Screen, Urine

Urine Cannabinoids Screen, Marinol, Dronabinol (THC), Marijuana, Hashish, Grass, MaryJane, Pot, THC, Hash, hemp, Ganga

Test Codes

Antrim #17084, EPIC: LAB7011, CANN9

Specimen Collection Criteria

Collect: 50 mL random urine in a screw-capped container (preferred) or other sterile collection cup with no preservative. (Minimum: 30 mL)

  • Refrigerate the specimen immediately after collection.
  • Record the exact time of specimen collection on the container or in the computer system.

Physician Office/Draw Specimen Preparation

Maintain specimen refrigerated (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: 50 mL urine, refrigerated (2-8°C or 36-46°F). (Minimum: 30 mL)

Rejection Criteria

  • Specimens not collected and processed as indicated.
  • Urine Vacutainer® tubes. Urine received in a glass or plastic tube with a rubber stopper may contain insufficient sample volume, preclude confirmatory testing, and give rise to contaminants and artifacts. 

In-Lab Processing

Analyze specimen immediately upon receipt in the Laboratory.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 3 months

Specimen Storage in Department Prior to Disposal:

Refrigerated (2-8°C or 36-46°F): 7 days


Canton Laboratory
Dearborn Chemistry Laboratory
Farmington Hills Chemistry Laboratory
Grosse Pointe Chemistry Laboratory
Lenox Main Laboratory
Livonia Main Laboratory
Royal Oak Toxicology Laboratory
Taylor Chemistry Laboratory
Trenton Chemistry Laboratory
Troy Chemistry Laboratory
Wayne Chemistry Laboratory 

NOTE:  All confirmations are sent to and performed at a reference laboratory.    


Sunday – Saturday, 24 hours a day.
STAT results (screen) available within 1 hour of receipt in the Laboratory, confirmation within 36 hours.
Routine results available within 48 hours.

Reference Range

Positive cutoff: 50 ng/mL.

Test Methodology

Screen: Enzyme Immunoassay.
Confirmation: Gas Chromatography/Mass Spectrometry (GC/MS).
NOTE: Confirmation performed at ARUP Reference Laboratory. 

The confirmation component of this test was developed by Beaumont Health. It has not been cleared or approved by the FDA. The laboratory is regulated under CLIA as qualified to perform high-complexity testing. This test is used for clinical purposes and should not be regarded as investigational or for research.


Concentrations of drugs and/or metabolite(s) detected in urine have not been correlated to drug levels in the bloodstream or with the degree of impairment. The presence of a drug and/or metabolite(s) in urine is only an indication of previous drug exposure.

Effective June 4, 2019, the laboratory will no longer automatically perform confirmation testing on positive THC screens in patients 21 years of age of older. If confirmation is needed, please call the lab to add the test on to the original specimen.

Clinical Utility

This assay is used to aid in the diagnosis and treatment of cannabinoid use or abuse. This assay provides a preliminary analytical result Positive results are confirmed by chromatographic methods. The primary psychoactive component of marijuana is delta-9-tetra-hydrocannabinol (THC). The THC concentration determines the potency of the marijuana. THC primarily affects the cardiovascular and central nervous systems. There is no reliable method for predicting the degree of impairment from cannabinoid concentrations measured in urine at this time.

CPT Codes

80307, 80349 (alternate: G0479, G0480).
LOINC: 18282-4, 8172-9


Last Updated


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