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HelpTest Code 700477 Ketoconazole
Additional Codes
EPIC Order: Miscellaneous Lab Test (LAB000)
Performing Laboratory
St. Louis Children's Hospital - Sendouts
Specimen Requirements
Patient Preparation: None
Container/Tube
Preferred: Plain red-top tube
Acceptable: Lavender-top (EDTA) tube
Collection Volume: 2.0 mL (minimum 1.0 mL)
Submission Container/Tube: If specimen is coming from outside facility aliquot processed sample into a plastic vial for transport (labeling with specimen type).
Special Instructions: None
Sample Rejection
Mislabeled or unlabeled specimens
Specimens collected in gel tubes
Logistics
Test Availability: Monday-Sunday
Cut-off time: None
Turnaround Time: 3-7 days
Reference Values
Reference Interval:
Reporting limit determined each analysis.
Peak plasma levels of 5.4 ± 1.7 mcg/mL occured at approximately 1 hour following a single 200 mg dose and peak plasma levels of 22 ± 3 mcg/mL occured at approximately 2 hours following a single 800 mg dose of ketoconazole.
Critical Values: None established
Methodology
Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)
Limitations
- NA
Additional Information
FOR SLCH CORE LABORATORY USE ONLY
Lab Processing Instructions: Centrifuge specimen to separate and aliquot sample into a 5-mL screw-capped plastic vial for transport (labeling with specimen type).
Processed Volume: 1.0 mL (minimum 0.5 mL) serum or EDTA plasma
Transport Temperature: Refrigerated
Analyte Stability:
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood (unprocessed) | Ambient | NA |
| Plasma/Serum (processed) | Refrigerated (preferred) | 14 days |
| Ambient | 14 days | |
| Frozen | 14 days |
Test Classification and CPT Code
80299
Test Classification: This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary.
LOINC
10990-0
Last Reviewed
08/2025