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Test ID PDSUX Drug Screen, Prescription/Over the Counter, Chain of Custody, Random, Urine

Useful For

The qualitative detection and identification of prescription or over-the-counter drugs frequently found in drug overdose or used with a suicidal intent


Providing, when possible, the identification of all drugs present


This test is not useful for drugs of abuse or illicit drug testing, including benzodiazepines, opioids, barbiturates, cocaine, and amphetamine type stimulants. 


This test is not useful for the assessment of therapeutic compliance.


This test is not intended for use in employment-related testing.


Chain of custody is required whenever the results of testing could be used in a court of law. Its purpose is to protect the rights of the individual contributing the specimen by demonstrating that it was under the control of personnel involved with testing the specimen at all times; this control implies that the opportunity for specimen tampering would be limited.

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)

Reporting Name

Drug Scrn, Prescription/OTC, CoC, U

Specimen Type


Additional Testing Requirements

If urine creatinine is required or adulteration of the sample is suspected, also order, ADLTX / Adulterants Survey, Chain of Custody, Random, Urine.

Specimen Required

Supplies: Chain-of-Custody Kit (T282) containing the specimen containers, seals, and documentation is required.

Specimen Volume: 30 mL

Collection Instructions: Collect a random specimen in the container provided, seal, and submit with the associated documentation to satisfy the legal requirements for chain-of-custody testing.

Additional Information

1. Submitting less than 30 mL will compromise the ability to perform all necessary testing.

2. See Prescription and Over-the-Counter (OTC) Drug Screens in Special Instructions.

Specimen Minimum Volume

1.1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  3 hours

Reference Values

Drugs detected are presumptive. Additional testing may be required to confirm the presence of any drugs detected.

Day(s) and Time(s) Performed

Monday through Friday

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
PDSUX Drug Scrn, Prescription/OTC, CoC, U 12286-1


Result ID Test Result Name Result LOINC Value
36235 Drugs detected: 12286-1
36236 Suspect Drug 12286-1
36237 Chain of Custody 77202-0

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

Additional Tests

Test ID Reporting Name Available Separately Always Performed
COCH Chain of Custody Processing No Yes

NY State Approved



1. Chain-of-Custody Request is included in the Chain-of-Custody Kit (T282).

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