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Test Code 9454 Ketoconazole, Serum/Plasma

Additional Codes

Mayo Test ID

Reporting Name


Performing Laboratory

NMS Labs

Specimen Type


Specimen Required

Submit only 1 of the following specimens:



Draw blood in a plain, red-top tube(s). Spin down and send 1 mL of serum refrigerated in plastic vial.



Draw blood in an EDTA lavender-top or pink-top tube(s). Spin down and send 1 mL of EDTA plasma in refrigerated in plastic vial.

Specimen Minimum Volume

0.22 mL

Specimen Stability Information

Specimen Type Temperature Time
Varies Refrigerated (preferred) 30 days
  Ambient  30 days

Reference Values

Reporting limit determined each analysis


Peak plasma levels of 5.4 ± 1.7 mcg/mL occurred at approximately 1 hour following a single 200 mg dose and peak plasma levels of 22 ± 3 mcg/mL occurred at approximately 2 hours following a single 800 mg dose of ketoconazole.

Day(s) and Time(s) Performed


CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FKETO Ketoconazole 10990-0


Result ID Test Result Name Result LOINC Value
Z1443 Ketoconazole 10990-0
Z1865 Reporting Limit 19147-8

Method Name

High-Performance Liquid Chromatography/Tandem Mass

Spectrometry (LC-MS/MS)

Barnes-Jewish Hospital Additional Information:
For BJH Laboratory Use Only
Laboratory Processing Instructions:
BJH Chemistry will forward to Mayo Medical Laboratories who will forward to the performing laboratory. Do not reject specimen if not received on ice.