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Test Code CST Cosyntropin Stimulation Test

Important Note

ACTH testing - Plasma must be frozen within an hour of draw if not being tested within 3 hours of draw. All off site draw sites need to send frozen plasma aliquot

Clinical Indications

N/A

Additional Test Codes

Epic Order Sets: Adult Adrenal Insufficiency
Sunquest Order Codes: ACTH
CORTB
CORT30
CORT60

Specimen Collection Type

ACTH
Lavender

CORTISOL
Preferred: Mint
Acceptable: Gold

Minimum Collection Volume

1 mL

Reference Range

See ACTH test for reference ranges
See CORTL test for reference ranges

Critical Value

N/A

Interpretation

N/A

Rejection Criteria

N/A

Specimen Availability for Add-on Testing

2 Days

Specimen Stability

2 Days Refrigerated

Day(s) Performed

Monday through Sunday
See ACTH for Mayo Days Performed

Performing Lab- Department

TUKHS-BH-Chemistry
Mayo Medical Laboratories in Rochester

CPT Code

82533
82024

LOINC Code

2143-6
2141-0

Test Alias

ACTH Adrenocorticotropic Hormone Stimulation
Cortisol Stimulation

Additional Information / Notes

Collect the baseline cortisol (CORTB) sample, then perform the ACTH stimulation. Collect specimen (CORT30)30 minutes after the ACTH stimulation, then collect another sample (CORT60) 60 minutes after the ACTH stimulation. Specimens collected in a serum gel tube must be centrifuged within 3 hours of collection. Serum gel should clot for 30 minutes prior to being centrifuged.