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HelpTest Code CGAM Chromogranin A, Serum
Additional Codes
| Mayo | CGAK |
| Epic ID | LAB2346 |
Specimen Type
SerumSpecimen Required
Patient Preparation: For at least 2 weeks before specimen collection, patient should stop taking proton pump inhibitor medications.
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Information: Centrifuge and aliquot serum into plastic vial. Do not submit in original tube.
Specimen Minimum Volume
0.2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Frozen (preferred) | 90 days |
| Ambient | 48 hours | |
| Refrigerated | 48 hours |
Transport frozen.
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross icterus | OK |
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Method Name
Immunofluorescent Assay (IFA)
Useful For
Aiding in monitoring disease progression during the course of disease and treatment in patients with gastroenteropancreatic neuroendocrine tumors (grade 1 and grade 2) when used in conjunction with other clinical methods
This test is not indicated for use as a stand-alone monitoring assay.
Day(s) Performed
Monday through Saturday
Report Available
1 to 3 daysReference Values
<93 ng/mL
Reference values apply to all ages.
CPT Code Information
86316