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Test ID COKEM Cocaine and Metabolites Confirmation, Meconium

Useful For

Detecting in utero drug exposure up to 5 months before birth

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Meconium


Ordering Guidance


For chain-of-custody testing, order COKMX / Cocaine and Metabolite Confirmation, Chain of Custody, Meconium.



Specimen Required


Supplies: Stool container, Small (Random), 4 oz (T288)

Container/Tube: Stool container

Specimen Volume: 1 g (approximately 1 teaspoon)

Collection Instructions: Collect entire random meconium specimen.


Specimen Stability Information

Specimen Type Temperature Time
Meconium Frozen (preferred) 21 days
  Refrigerated  21 days
  Ambient  72 hours

Reference Values

Negative

 

Positive results are reported with a quantitative liquid chromatography tandem mass spectrometry (LC-MS/MS) result.

 

Cutoff concentrations for LC-MS/MS testing:

Cocaine: 20 ng/g

Benzoylecgonine: 20 ng/g

Cocaethylene: 20 ng/g

m-Hydroxybenzoylecgonine: 20 ng/g

Day(s) Performed

Monday through Sunday

CPT Code Information

G0480

80353 (if appropriate for select payers)

Clinical Toxicology CPT Code Client Guidance

Report Available

2 to 3 days

Reject Due To

Grossly bloody Reject; Pink OK
Stool;
Diapers		 Reject

Forms

If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.