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HelpTest Code LAB2124 Cancer Antigen 125 (CA 125), Serum
Additional Codes
CA25
Reporting Name
Cancer Ag 125 (CA 125), SUseful For
Evaluating individuals' response to ovarian cancer therapy
Predicting recurrent ovarian cancer
This test is not useful for cancer detection screening in the normal population.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Patient Preparation: For 12 hours before specimen collection do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial.
Specimen Minimum Volume
0.75 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 5 days | |
| Frozen | 168 days |
Reference Values
Males: Not applicable
Females: <46 U/mL
Day(s) Performed
Monday through Friday
CPT Code Information
86304
Report Available
1 to 3 daysReject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
Method Name
Electrochemiluminescent Immunoassay (ECLIA)
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.