Time Sensitive

Ordering Recommendation

Use to detect and document fetal exposure to THC during approximately the last trimester of a full-term pregnancy. For panel testing that includes THC metabolite, refer to Drug Detection Panel and THC Metabolite, Meconium, Qualitative (3006373).

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

All meconium (blackish material) excreted until milk/formula based stool (yellow-green) appears.

Specimen Preparation

Transport 0.5 g (equivalent to 1/2 inch cube) for each separate confirmation required. (Min: 0.13 g or 1/4 inch cube)

Storage/Transport Temperature

Room temperature.

Unacceptable Conditions

Ambient: 1 week; Refrigerated: 3 months; Frozen: 1 year


Qualitative Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)




1-4 days

Reference Interval

Interpretive Data

Drugs Covered: 9-carboxy-THC
Positive cutoff:
5 ng/g

Meconium begins to form between the 12th and 16th week of gestation. Meconium drug testing can detect maternal drug use during the last 4 to 5 months of pregnancy. A negative result does not exclude the possibility that a mother used drugs during pregnancy. Detection of drug use depends on the quantity and quality of the specimen tested as well as the pattern and frequency of drug(s) used by mother. The concentration value must be greater than or equal to the cutoff to be reported as positive. Interpretive questions should be directed to the laboratory.

For medical purposes only; not valid for forensic use.

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA-certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes

80349 (Alt code: G0480)


Component Test Code* Component Chart Name LOINC
0092316 Marijuana, Meconium, Qual 27024-9
* 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.


  • 9-Carboxy-THC
  • Cannabinoids
  • Cannabis
  • Dronabinol
  • Marijuana
  • Marinol
  • THC
Marijuana Metabolite, Meconium, Qualitative