Drugs of Abuse - Meconium Qualitative
Label Mnemonic: MEC9
Epic code: LAB4840
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mailout Laboratory
6240-8 RCP
Collection Medium:
Meconium. All meconium (blackish material) excreted until milk/formula based stool (yellow-green) appears.

Preferred Minimum: 4 g or 3/4 inch cube on each side
Absolute Minimum: 2 g or 3/4 inch cube on each side
Turn Around Time:
1-3 days upon receipt at reference laboratory
Reference Range:
Drugs/Drug Classes Cutoff Concentrations (ng/g) Drugs/Drug Classes Cutoff Concentrations (ng/g)
Buprenorphine 20 Amphetamine 20
Norbuprenorphine 20 Benzoylecgonine 20
Naloxone 20 m-OH-Benzoylecgonine 20
Codeine 20 Cocaethylene 20
Dihydrocodeine 20 Cocaine 20
Fentanyl 10 MDMA (Ecstasy) 20
Hydrocodone 20 Methamphetamine 20
Norhydrocodone 20 Phentermine 20
Hydromorphone 20 Alprazolam 5
Meperidine 20 Alpha-OH-Alprazolam 5
Methadone 10 Butalbital 50
Methadone metabolite 10 Clonazepam 5
6-Acetylmorphine 20 7-Aminoclonazepam 5
Morphine 20 Diazepam 5
Methylphenidate 20 Lorazepam 20
Oxycodone 20 Midazolam 20
Noroxycodone 20 Alpha-OH-Midazolam 20
Oxymorphone 20 Nordiazepam 20
Tapentadol 20 Oxazepam 20
Tramadol 20 Phenobarbital 200
N-desmethyltramadol 20 Temazepam 20
O-desmethyltramadol 20 Zolpidem 10
Gabapentin 20 Phencyclidine (PCP) 10
Interpretive Data:
Detection of drugs in meconium is intended to reflect maternal drug use during approximately the last trimester of a full-term pregnancy. The pattern and frequency of drug(s) used by the mother cannot be determined by this test. A negative result does not exclude the possibility that a mother used drugs during pregnancy. Detection of drugs in meconium depends on the extent of maternal drug use, as well as drug stability, unique characteristics of drug deposition in meconium, and the performance of the analytical method. Drugs administered during labor and delivery may be detected. Detection of drugs in meconium does not insinuate impairment and may not affect outcomes for the infant. Interpretive questions should be directed to the laboratory.

For medical purposes only; not valid for forensic use.
Qualitative Liquid Chromatography/Tandem Mass Spectrometry
CPT Code:
80326, 80347, 80364, 80355