Lab Test

Phosphatidylethanol, Whole Blood, Quantitative

PEth, 1, 2-dioleoylo-sn-glycero-3-phosphoethanol, 1-palmitoyl-2-sn-glycero-3-phosph

Test Codes

ARUP: 3002598, EPIC: LAB7156, SOFT: XPETH


Biomarker associated with ethanol consumption; may be helpful in monitoring alcohol abstinence.

Specimen Collection Criteria

Collect: One Lavender-top EDTA tube. (Minimum: 0.5 mL)

Physician Office/Draw Specimen Preparation

Do not centrifuge. Maintain whole blood refrigerated (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: Whole blood refrigerated (2-8°C or 36-46°F). (Minimum: 0.5 mL)

Rejection Criteria

Specimens not collected and processed as indicated.


Whole Blood
Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 2 weeks
Frozen (-20°C/-4°F or below): 1 month

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.


Sent to ARUP Laboratories, Salt Lake City, UT, forwarded to Medtox Laboratory.


Sunday – Saturday 
Results available in 2-5 days.

Reference Range

Less than 10 ng/mL

Test Methodology

Quantitative Liquid Chromatography/Tandem Mass Spectrometry.


By report.

Clinical Utility

Measures blood levels of phosphatidylethanol, an alcohol-specific biomarker associated with ethanol consumption; may be helpful in monitoring alcohol abstinence.

CPT Codes

80321, (Alt code: G0480).


Last Updated


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This directory currently reflects information only for specimens collected and/or processed at the
Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.