0090676
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THC Metabolite, Serum or Plasma, Quantitative

CANNAB SP
Example Reports
Negative
Positive

Ordering Recommendation

Use to detect exposure to cannabinoids. This test does not distinguish between the delta-8 and delta-9 forms of THC or their metabolites.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Gray (sodium fluoride/potassium oxalate). Also acceptable: Plain red, green (sodium heparin), lavender (EDTA), or pink (K2EDTA).

Specimen Preparation

Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP standard transport tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Separator tubes. Plasma or whole blood collected in light blue (sodium citrate). Specimens exposed to repeated freeze/thaw cycles.

Remarks
Stability

After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years

Methodology

Quantitative Liquid Chromatography-Tandem Mass Spectrometry

Performed

Sun, Tue, Thu, Fri

Reported

1-5 days

Reference Interval

Effective August 17, 2015

Drugs Covered Cutoff Concentrations
11-Nor-9-carboxy-THC 5 ng/mL

Interpretive Data

Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry

Positive cutoff: 5 ng/mL

For medical purposes only; not valid for forensic use.

The drug analyte detected in this assay, 9-carboxy THC, is a metabolite of delta-9-tetrahydrocannabinol (THC). Detection of 9-carboxy THC suggests use of, or exposure to, a product containing THC. This test cannot distinguish between prescribed or nonprescribed forms of THC, nor can it distinguish between active or passive use. The plasma half-life for 9-carboxy THC metabolite is estimated to range from 4-12 hours.

Compliance Category

Laboratory Developed Test (LDT)

Note

Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
11/13/2023
X
N/A

CPT Codes

80349 (Alt code: G0480)

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Components

Component Test Code* Component Chart Name LOINC
0090671 11-Nor-9-carboxy-THC, S/P, Quant 8170-3
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Marinol
  • Pain Management
  • THC
  • 9-Carboxy-THC
  • Cannabinoids
  • Cannabis
  • Dronabinol
  • Marijuana
THC Metabolite, Serum or Plasma, Quantitative