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Test Directory

Test Directory Corticosterone

Corticosterone

Test Summary

Measurement of corticosterone may help confirm the diagnosis of the very rare aldosterone deficiency disorder, corticosterone methyl oxidase (18-hydroxylase) enzyme deficiency where the ratio of corticosterone to 18-hydroxycosticosterone may be increased.

Aliases

Specimen Collection

Special Instructions

N/A

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Instructions

Separate serum after clotting. An early morning specimen is preferred.

Patient Preparation

N/A

Storage

N/A

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 14 days
Frozen: 1 year

Limitations

N/A

Other Acceptable Specimens

Plasma collected in EDTA (lavender-top) tube, EDTA (royal blue-top) tube, sodium heparin (green-top) tube

Unacceptable Specimens

N/A

Order Code

CSTRON

EPIC (Premier) Code

LAB3613

Includes

N/A

CPT Code

82528

Billing Code

671242

CPT Statement

Methodology

Chromatography/Mass Spectrometry

FDA Status

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. 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. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Physician Attestation of Informed Consent

N/A

Testing Laboratory

Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano CA, 92675

Department

Reference Testing

Reference Range

See Laboratory Report

Setup Schedule / Expected Turnaround Time

Tuesday; Report available: 2 - 10 days