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The University of Chicago Medicine Laboratories

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Mayo Clinic Laboratories

Test Code OPATM Opiate Confirmation, Meconium

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Meconium


Ordering Guidance


For chain-of-custody testing, order OPTMX / Opiate 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 Minimum Volume

0.3 g (approximately 1/4 teaspoon)

Specimen Stability Information

Specimen Type Temperature Time
Meconium Frozen (preferred) 28 days
  Refrigerated  28 days
  Ambient  14 days

Reference Values

Negative

 

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

Cutoff concentrations for LC-MS/MS testing:

Codeine: 20 ng/g

Hydrocodone: 20 ng/g

Hydromorphone: 20 ng/g

Morphine: 20 ng/g

Oxycodone: 20 ng/g

Oxymorphone: 20 ng/g

Day(s) Performed

Monday through Sunday

CPT Code Information

80361

80365

G0480 (if appropriate)

Report Available

2 to 3 days

Reject Due To

Grossly bloody Reject; Pink OK
Stool
Diapers		 Reject

Method Name

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

Forms

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