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HelpEpic Code LAB1231986 Tamoxifen and Metabolites
Test Name Alias
LAB1231604 | Quest: 12761 | Tamoxifen | 4-Hydroxy-Tamoxifen, Endoxifen, N-desmethyltamoxifen, Nolvadex®
Interface Order Alias
1231986
Clinical Information
Includes
- Tamoxifen
- N-desmethyltamoxifen
- Endoxifen
- 4-Hydroxy-Tamoxifen
Clinical Utility: Therapeutic Drug Monitoring.
Specimen Requirements
Specimen Collection Criteria
Collect (preferred): One plain Red-top tube.
Acceptable: One Lavender-top EDTA tube or One Pink-tube (EDTA)
Do not use Serum Separator Tubes.
Physician Office/Draw Specimen Preparation
Centrifuge specimen to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma to a plastic transport tube and refrigerate (2-8°C or 36-46°F).
In-Lab Processing
Centrifuge specimen to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma to a plastic transport tube and refrigerate (2-8°C or 36-46°F).
Specimen Transport Temperature
Transport: 1.0 mL serum or plasma, refrigerated (2-8°C or 36-46°F). (Minimum: 0.4 mL)
Rejection Criteria
- Serum separator tube(SST).
- Received room temperature.
- Specimens not collected and processed as indicated.
Specimen Stability
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): 2 days
Refrigerated (2-8°C or 36-46°F): 30 days
Frozen (-20°C/-4°F or below): 30 days
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.
Test Frequency
Performed: Varies.
Results available in 7-10 days.
Reference Range
By Report
Performing Department
Send Outs
Performing Department Laboratory Location
Sent to Quest Diagnostics- Wood Dale, IL and forwarded to NMS Labs in Horsham, PA.
Methodology
High Performance Liquid Chromatography / Tandem Mass Spectrometry (LC-MS/MS)
CPT
80299
LOINC
Unavailable
Reviewed Date
11/3/2025
Orderable Regions
Send Outs