Ordering Recommendation

Assesses genetic risk of abnormal drug metabolism for drugs metabolized by CYP2C19, CYP2C8, CYP2C9, CYP2D6, CYP3A4, and CYP3A5. May aid in drug selection and dose planning for many drugs.

Mnemonic
CYP PANEL
Methodology

Polymerase Chain Reaction/Fluorescence Monitoring

Performed

Varies

Reported

5-10 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Lavender (K2EDTA), Pink (K2EDTA), or Yellow (ACD Solution A or B).

Specimen Preparation

Transport 3 mL whole blood. (Min: 1 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Plasma or serum. Specimens collected in sodium heparin or lithium heparin.

Remarks
Stability

Ambient: 72 hours; Refrigerated: 1 week; Frozen: 1 month

Reference Interval

By report

Interpretive Data

Background Information for Cytochrome P450 Genotyping Panel:
Characteristics:
The cytochrome P450 (CYP) isozymes 2C19, 2C8, 2C9, 2D6 and the CYP3A subfamily are involved in the metabolism of many drugs. Variants in the genes that code for CYP2C19, CYP2C8, CYP2C9, CYP2D6, CYP3A4, and CYP3A5 will influence pharmacokinetics of respective substrates, and may predict or explain non-standard dose requirements, therapeutic failure, or adverse reactions.
Inheritance:
Autosomal codominant.
Cause:
Gene variants affect enzyme expression or activity.
Variants Tested:
See the Additional Technical Information document.
Clinical Sensitivity:
Drug-dependent.
Methodology:
Polymerase chain reaction (PCR) and fluorescence monitoring.
Analytical Sensitivity and Specificity:
Greater than 99 percent.
Limitations:
Only the targeted variants will be detected by this panel, and assumptions about phase and content are made to assign alleles. Publically available sources such as the www.pharmvar.org or www.pharmgkb.org provide guidance on phenotype predictions and allele frequencies. A combination of the CYP2D6*5 (gene deletion) and a CYP2D6 gene duplication cannot be specifically identified; however, this combination is not expected to adversely affect the phenotype prediction. Diagnostic errors can occur due to rare sequence variations. Risk of therapeutic failure or adverse reactions with gene substrates may be affected by genetic and non-genetic factors that are not detected by this test. This result does not replace the need for therapeutic drug or clinical monitoring.  

Please note the information contained in this report does not contain medication recommendations, and should not be interpreted as recommending any specific medications. Any dosage adjustments or other changes to medications should be evaluated in consultation with a medical provider.


Compliance Statement C: For human genetic inheritable conditions and mutations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Counseling and informed consent are recommended for genetic testing. Consent forms are available online.

Note

Whole blood is the preferred specimen. Saliva samples that yield inadequate DNA quality and/or quantity will be reported as inconclusive if test performance does not meet laboratory-determined criteria for reporting.

Hotline History
N/A
CPT Codes

81225; 81226; 81227; 81230; 81231; 81479

Components
Component Test Code* Component Chart Name LOINC
3001503 CYP2C8 Genotype 78972-7
3001504 CYP2C9 Genotype 46724-1
3001510 CYP2C19 Genotype 57132-3
3001515 CYP2D6 Genotype 40425-1
3001520 CYP3A4 Genotype 81139-8
3001521 CYP3A5 Genotype 81140-6
3001525 CYP PANEL Specimen 31208-2
3001526 CYP PANEL Interpretation 50398-7
3002511 CYP PANEL, GeneDose Link
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • CYP2C19
  • CYP2C8
  • CYP2C9
  • CYP2D6
  • CYP3A4
  • CYP3A5
Cytochrome P450 Genotyping Panel