Phosphatidylethanol (PEth)

CPT: 80321
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  • Ethyl Alcohol Biomarker

Expected Turnaround Time

5 - 10 days

Related Documents

Specimen Requirements


Whole blood


1 mL

Minimum Volume

0.5 mL


Lavender-top (EDTA) tube or gray-top (sodium fluoride) tube

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen. Specimen is stable for three days at room temperature, for two weeks refrigerated, and for six months frozen.

Test Details


Measures blood levels of phosphatidylethanol, an alcohol-specific biomarker


Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference Interval

PEth levels in excess of 20 ng/mL are considered evidence of moderate to heavy ethanol consumption.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
791584 Phosphatidylethanol (PEth) 74661-0 791931 PHOSPHATIDYLETHANOL 76660-0
791584 Phosphatidylethanol (PEth) 74661-0 791583 Phosphatidylethanol (PEth) ng/mL 74661-0

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