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Test ID ETGR Ethyl Glucuronide Screen with Reflex, Random, Urine

Ordering Guidance

For situations where chain of custody is required, a Chain of Custody Kit (T282) is available. For chain-of-custody testing, order ETGX / Ethyl Glucuronide Confirmation, Chain of Custody, Random, Urine.

Additional Testing Requirements

If urine creatinine is required or adulteration of the sample is suspected, the following test should also be ordered, ADULT / Adulterants Survey, Random, Urine.

Specimen Required

Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Collection Container/Tube: Plastic urine container

Submission Container/Tube: Plastic, 5 mL tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.


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

Useful For

Screening and confirmation for drug abuse involving alcohol

Profile Information

Test ID Reporting Name Available Separately Always Performed
ETGS Ethyl Glucuronide Screen, U Yes Yes

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
ETGC Ethyl Glucuronide Confirmation, U Yes No

Testing Algorithm

Testing begins with a screening assay. If the screen is positive, then the liquid chromatography-tandem mass spectrometry confirmation with quantification will be performed at an additional charge.

Method Name


Reporting Name

Ethyl Glucuronide Scrn w/Reflex, U

Specimen Type


Specimen Minimum Volume

2.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  72 hours

Reference Values


Screening cutoff concentration: 500 ng/mL

Day(s) Performed

Monday through Saturday

Report Available

Same day/1 to 2 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


LOINC Code Information

Test ID Test Order Name Order LOINC Value
ETGR Ethyl Glucuronide Scrn w/Reflex, U 58375-7


Result ID Test Result Name Result LOINC Value
63420 Ethyl Glucuronide Screen, U 58375-7