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Test Code DRUGCNF Drug of Abuse Screen, With Confirmation, Urine

Important Note

Only orderable on inpatients.

See DRUGUNCF for Outpatients, individual confirmation tests should be ordered after the screen is complete.

Additional Codes

  • Expanse Test Name: Drug Scrn with Confirm, U
  • Medinet Ref Code: DRUGSU
  • OV Code: URCHEM*DRUGCNF

Performing Laboratory

St. Lukes Hospital Laboratory

Methodology

Metal Soluble Immunoassay

Screens for amphetamines, barbiturates, benzodiazepines, Buprenorphine, cocaine, methadone, opiates,oxycodone, phencyclidine (PCP), tetrahydrocannabinol (THC), and tricyclic antidepressants (TCA) including amitriptyline, chlorpromazine, chlorprothixene, clomipramine, cyclobenzaprine, desipramine, doxepin, imipramine, maprotiline, norclomipramine, nordoxepin, nortriptyline, perphenazine, phenothiazine, promazine, protriptyline, thiothixene, and trimipramine.

Note:  Screening results are unconfirmed. Positive results on clinic outpatients are confirmed at a reference laboratory at an additional charge.

Specimen Requirements

60 mL from a random urine collection. No preservative.

Reference Values

The following drugs and/or metabolites are screened for and have a cutoff value of:
Amphetamines:  1,000 ng/mL

Barbiturates:  200 ng/mL

Benzodiazepines:  200 ng/mL

Buprenorphine: 10ng/mL

Cocaine:  300 ng/mL

Opiates:  300 ng/mL

Oxycodone: 100 ng/mL

Phencyclidine:  25 ng/mL

Methadone:  300 ng/mL

THC:  50 ng/mL

TCA:  300 ng/mL

TCA drugs included

Amitriptyline:  positive at 500 ng/mL

Chlorpromazine:  negative at 100 µg/mL

Chlorprothixene:  negative at 100 µg/mL

Clomipramine:  negative at 100 µg/mL

Cyclobenzaprine:  positive at 5 µg/mL

Desipramine:  300 ng/mL

Doxepin:  positive at 5 µg/mL

Imipramine:  positive at 125 ng/mL

Maprotiline:  positive at 500 ng/mL

Norclomipramine:  negative at 100 µg/mL

Nordoxepin:  positive at 750 ng/mL

Nortriptyline:  positive at 500 ng/mL

Perphenazine:  negative at 100 µg/mL

Phenothiazine:  negative at 100 µg/mL

Promazine:  positive at 250 ng/mL

Protriptyline:  negative at 100 µg/mL

Thiothixene:  negative at 100 µg/mL

Trimipramine:  positive at 5 µg/mL

Positive results will be confirmed at a reference laboratory.

Interfering Substances:

Some natural herbal and plant products contain substances which may cross-react and produce a false-positive drug screen.

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

80307