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Test ID KETAX Ketamine and Metabolite Confirmation, Chain of Custody, Random, Urine

Specimen Required

Container/Tube: Chain of Custody Kit (T282) containing the specimen containers, seals, and documentation required.

Specimen Volume: 10 mL

Collection Instructions: Collect 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. No specimen substitutions.

2. STAT requests are not accepted for this procedure.

3. Submitting less than 10 mL will compromise our ability to perform all necessary testing.


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

Useful For

Detection and confirmation of ketamine use


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.

Additional Tests

Test ID Reporting Name Available Separately Always Performed
COCH Chain of Custody Processing No Yes
ADLTX Adulterants Survey, CoC, U Yes Yes

Testing Algorithm

Adulterants testing will be performed on all chain of custody urine samples as per regulatory requirements.

Method Name

Gas Chromatography-Mass Spectrometry (GC-MS)

Reporting Name

Ketamine Confirmation, CoC, U

Specimen Type


Specimen Minimum Volume

2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  72 hours

Reference Values


Day(s) Performed


Report Available

2 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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 US Food and Drug Administration.

CPT Code Information


G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
KETAX Ketamine Confirmation, CoC, U In Process


Result ID Test Result Name Result LOINC Value
36194 Norketamine 72799-0
36195 Ketamine Confirmation 20537-7
36196 Ketamine Interpretation 69050-3
36197 Chain of Custody 77202-0

NY State Approved