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Cytochrome P450 2C9 Genotyping

CPT: 81227
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Expected Turnaround Time

6 - 10 days

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Specimen Requirements


Whole blood or LabCorp buccal swab kit (buccal swab collection kit contains instructions for use of a buccal swab)


7 mL whole blood or LabCorp buccal swab kit

Minimum Volume

3 mL whole blood or two buccal swabs


Lavender-top (EDTA) tube or yellow-top (ACD) tube or LabCorp buccal swab kit

Storage Instructions

Room temperature

Causes for Rejection

Frozen specimen; hemolysis; quantity not sufficient for analysis; improper container; one buccal swab; wet buccal swab

Test Details


This test provides genotype information for CYP2C9.


This assay detects CYP2C9 alleles *1, *2 and *3. Other alleles are not detected by this assay.

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.


Real-time polymerase chain reaction (RT-PCR)


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
511893 Cytochrome P450 2C9 Genotyping 511890 2C9 Genotype 46724-1
511893 Cytochrome P450 2C9 Genotyping 511891 Comment: 77202-0
511893 Cytochrome P450 2C9 Genotyping 511892 Director Review: 72486-4
511893 Cytochrome P450 2C9 Genotyping 000000 MGRM Informed Consent Review N/A

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