Drugs of Abuse - Meconium
Order Code: MEC9
Epic Lab Code: LAB4840
Order Form: A-1a Miscellaneous Request or Epic Req
Commercial Mail-out Laboratory
01250 PFP
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:
Within 4 days
Negative: 1-2 days; Positive: 2-4 days
Reference Range:
Drugs Covered and Cutoff Concentrations Drug Screen Confirmation Marijuana 30 ng/g 5 ng/g Cocaine 30 ng/g 20 ng/g Opiates 30 ng/g 20 ng/g Phencyclidine 15 ng/g 10 ng/g Amphetamines 30 ng/g 20 ng/g Barbiturates 75 ng/g 50 ng/g Methadone 40 ng/g 10 ng/g Benzodiazepines 75 ng/g 20 ng/g Propoxyphene 75 ng/g 10 ng/g
Interpretive Data:
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 the mother. Although not likely, drugs administered during labor and delivery may be detected in meconium. Interpretive questions should be directed to the laboratory.

The concentration at which the screening test can detect a drug or metabolite varies within a drug class. The concentration value must be greater than or equal to the cutoff to be reported as positive.

For medical purposes only; not valid for forensic use.

Note: If screen is positive, then confirmation by GC/MS and/or LC-MS/MS will be added.

Confirmation testing will be performed in the following order of priority:
Amphetamines (0.125 g sample required)
Cocaine (0.5 g sample required)
Opiates (0.125 g required)
Marijuana (0.125 g required)
Benzodiazepines (0.5 g sample required)
Methadone (0.125 g sample required)
Propoxyphene (0.125 g sample required)
Phencyclidine - PCP (0.5 g sample required)
Barbiturates (0.5 g sample required)
Enzyme-Linked Immunoassay/Gas Chromatography-Mass Spectrometry/Liquid Chromatography-Tandem Mass Spectrometry
CPT Code:
80301 Screen; if positive add appropriate CPT code for drug confirmed: 80349 Marijuana; 80353 Cocaine; 80361 Opiates; 83992 Phencyclidine; 80324 Amphetamines; 80345 Barbiturates; 80358 Methadone; 80346 Benzodiazepine; 80367 Propoxyphene