Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  

CORTISOL, POST 1MG DEXAMETHASONE SUPRESSION

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB2082         Geisinger Epic ID: 56528

SPECIMEN COLLECTION
Specimen type:
Plasma or serum
Preferred collection container:
Specimen required:
1 mL of serum or plasma; minimum 0.5 mL
Patient preparation:
Patient is given 1 mg dexamethasone at 11 p.m. under the direction of his/her provider. Then at ~8 a.m., blood sample is collected for cortisol testing.

SPECIMEN PROCESSING
Specimen processing instructions:
Allow serum to clot. Centrifuge to separate serum or plasma. 
Transport temperature:
Refrigerated (preferred). Frozen specimen also acceptable.
Specimen stability:
Room temperature: 24 hours. Refrigerated: 4 days. Frozen: 12 months.
Rejection criteria:
Hemolysis, lipemia.

TEST DETAILS
Reference interval:
<=1.8 ug/dL
CPT code(s):
82533
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Cortisol test for dexamethasone suppression.
Methodology:
Electrochemiluminescence Immunoassay
Synonyms:
Hydrocortisone
CORTDS
Clinical significance:
This is a screening test for Cushing's syndrome. Values >1.8 ug/dL represent inadequate suppression of Cortisol but are not diagnostic of Cushing's syndrome. Further testing for Cortisol excess may be indicated and should be determined clinically.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 12/24/2020

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Mariana Moyer, Jared Shepherd
Frequency: Daily
Performed stat? No
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