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22164 ACTH Stimulation Test, 60 Min Cortisol

ACTH Stimulation Test, 60 Min Cortisol
Test Code: ACTHST2
Synonyms/Keywords
Cosyntrophin Stimulation Test, Adrenocorticol (ACTH) Stimulation Test, Cortrosyn Stimulation Test​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Serum or Plasma​ Serum Separator Tube (SST) ​Lithium-heparin Green Top Tube (GTT) or Red Top Tube (RTT)​ 0.5 mL​ 0.3 mL​ 0.255 mL​
Specimen Stability Information
Specimen Type Temperature Time
Serum/Plasma​ Ambient​ 8 hours​
Refrigerate​ 7 days​
Serum​ Frozen​ >7 days​
Interference
​Fluorescein will interfere; blood should not be drawn for 48 hours following fluorescein angiography for diabetic retinopathy.
Human Anti-Murine Antibodies (HAMA) may develop leading to test interference in patients receiving murine based chemotherapy agents or tumor-imaging studies.

For Tosoh AIA immunoassay method performed at Diagnostic and Treatment Center lab, the drug asfotase alfa (Strensiq®), used for the treatment of patients with perinatal/infantile- and juvenile-onset hypophosphatasia (HPP), causes falsely decreased test results. Test results from patients treated with asfotase alfa should be interpreted with respect to the clinical picture of the patient. Recommend sending test to Marshfield Center lab for analysis by an alternate method.
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center​ ​Monday through Friday ​Less than 2 hours​ ​Competitive Enzyme Immunoassay/Tosoh
Marshfield​ Monday through Sunday​ Less than 2 hours​
Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
Test Information

​Test orders a baseline cortisol plus one 60 min post-ACTH cortisol.  n alternative Low Dose (1 ug) ACTH Stimulation Test is also employed by some members of the Endocrinology Department. This requires saline dilution of a 250 ug dose as a 1 ug dosage form is not yet commercially available. Some argue that this dosing level is more physiologic and provides a better indication of adrenal reserve. For this protocol, a 30-minute specimen is typically obtained following injection. A normal response with this protocol is any cortisol >= 18 ug/dL.

ACTH (Cosyntrophin) One-Hour Stimulation Test

Reference Range Information
Performing Location Reference Range
All Performing Sites Standard 250 ug ACTH dose: Normal if cortisol >= 20 ug/dL at 30 or 60 min post dose draw.
Alternate Low 1 ug ACTH dose: Normal if cortisol >= 18 ug/dL at 30 min post dose draw. ​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
80400​ ​ ​ ​ ​
Synonyms/Keywords
Cosyntrophin Stimulation Test, Adrenocorticol (ACTH) Stimulation Test, Cortrosyn Stimulation Test​
Ordering Applications
Ordering Application Description
​Centricity ​ACTH Stimulation, 60 Min Cortisol
​Cerner ​Cortisol Level 60 Minute
​COM ​ACTH Stim, 60 Min Cort
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Serum or Plasma​ Serum Separator Tube (SST) ​Lithium-heparin Green Top Tube (GTT) or Red Top Tube (RTT)​ 0.5 mL​ 0.3 mL​ 0.255 mL​
Specimen Stability Information
Specimen Type Temperature Time
Serum/Plasma​ Ambient​ 8 hours​
Refrigerate​ 7 days​
Serum​ Frozen​ >7 days​
Interference
​Fluorescein will interfere; blood should not be drawn for 48 hours following fluorescein angiography for diabetic retinopathy.
Human Anti-Murine Antibodies (HAMA) may develop leading to test interference in patients receiving murine based chemotherapy agents or tumor-imaging studies.

For Tosoh AIA immunoassay method performed at Diagnostic and Treatment Center lab, the drug asfotase alfa (Strensiq®), used for the treatment of patients with perinatal/infantile- and juvenile-onset hypophosphatasia (HPP), causes falsely decreased test results. Test results from patients treated with asfotase alfa should be interpreted with respect to the clinical picture of the patient. Recommend sending test to Marshfield Center lab for analysis by an alternate method.
Reference Range Information
Performing Location Reference Range
All Performing Sites Standard 250 ug ACTH dose: Normal if cortisol >= 20 ug/dL at 30 or 60 min post dose draw.
Alternate Low 1 ug ACTH dose: Normal if cortisol >= 18 ug/dL at 30 min post dose draw. ​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center​ ​Monday through Friday ​Less than 2 hours​ ​Competitive Enzyme Immunoassay/Tosoh
Marshfield​ Monday through Sunday​ Less than 2 hours​
Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
80400​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.