Clinics and Departments

Laboratory Services

Lab Dept:


Test Name:


General Information

Lab Order Codes:



Toxicology Screen, Urine

CPT Codes:

G0431 – Drug screen, qualitative; multiple drug classes by high complexity test method (e.g., immunoassay, enzyme assay), per patient encounter

Test Includes:

List of drugs screened for in urine: acetaminophen, acetylmorphine, alprazolam and metabolite (as benzodiazepine metabolite), amitriptyline, amobarbital, amoxapine and metabolite, amphetamine, barbital, barbiturates, benzodiazepine metabolite, benztropine, brompheniramine, bupropion and metabolites, butabarbital, butalbital, caffeine, carbamazepine and metabolite, carisoprodol, chlordiazepoxide and metabolites (as benzodiazepine metabolite), chlorpheniramine and metabolite, chlorpromazine, chlorzoxazone, clomipramine and desmethylclomipramine, clonazepam (as benzodiazepine metabolite), cocaine and metabolite, codeine, cyclobenzaprine, desalkylflurazepam (as benzodiazepine metabolite), desipramine, desmethyldiazepam (as benzodiazepine metabolite), dextromethorphan (as methorphan), diazepam and metabolites (as benzodiazepine metabolite), diltiazem, diphenhydramine and metabolite, doxepin and desmethyldoxepin, doxylamine, ephedrine (and/or pseudoephedrine), ethosuximide, ethyl alcohol, fluoxetine and norfluoxetine, flurazepam and metabolite (as benzodiazepine metabolite), fluvoxamine, glutethimide, guaifenesin, halazepam (as benzodiazepine metabolite), heroin (as acetylmorphine and morphine), hydrocodone, hydromorphone, hydroxyzine and metabolite, ibuprofen and metabolite, imipramine, ketoprofen, lidocaine and metabolite, lorazepam (as benzodiazepine metabolite), loxapine and metabolite, marijuana (as metabolite), mefenamic acid, meperidine and normeperidine, mephobarbital, mepivacaine, meprobamate, mesoridazine, methadone and metabolite, methamphetamine, methapyrilene, methaqualone, methocarbamol, methorphan, methylphenidate, metoprolol, midazolam (as benzodiazepine metabolite), morphine, naproxen and metabolite, nifedipine, nortriptyline, opiates, orphenadrine, oxaprozin, oxazepam (as benzodiazepine metabolite), oxycodone, pentazocine, pentobarbital, phenacetin, phencyclidine, phenmetrazine, phenobarbital, phentermine, phenylpropanolamine, phenytoin, prazepam (as benzodiazepine metabolite), primidone, procainamide, procaine, promazine, promethazine, propoxyphene and metabolites, propranolol, protriptyline, pseudoephedrine (and/or ephedrine), pyrilamine, quazepam (as benzodiazepine metabolite), salicylate, secobarbital, sertraline and metabolite, temazepam (as benzodiazepine metabolite), terfenadine metabolite, THC (marijuana) metabolite, theophylline, thiopental, thioridazine, tolmetin, tramadol and metabolites, triazolam and metabolite (as benzodiazepine metabolite), tricyclic antidepressants, trihexyphenidyl, trimipramine, tripelennamine, valproic acid, venlafaxine and metabolite, and verapamil and metabolite. This list is not necessarily inclusive of all possible drugs that could be identified.


Test Indications:


Lab Testing Sections:

Chemistry - Sendouts

Referred to:

MedTox Laboratories (Test# 100446)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

5 days

Special Instructions:



Specimen Type:

Urine, random


Urine Cup

Draw Volume:

30 mL urine

Processed Volume:

30 mL (Minimum: 3 mL) urine (no preservative)

Note: Submission of the minimum volume results in an elevated reporting limit and inability to repeat analysis.


Routine urine collection

Special Processing:

Lab Staff: Submit specimen in a urine transfer tube without preservative. Store and ship at refrigerated temperatures.

Patient Preparation:


Sample Rejection:

Mislabeled or unlabeled specimens


Reference Range:

Negative, none detected

Critical Values:

Positive values




Immunoassay (IA) and Liquid Chromatograpy/Tandem Mass Spectrometry; (LC/MS/MS)


MedTox Laboratories January 2013


5/3/2010: CPT updates
2/8/2011: CPT updates
1/7/2013: Order code, method and CPT updates
1/12/2015: CPT update
5/18/2015: CPT update
8/20/2015: CPT update, remove G0434

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