Cancer Antigen 125 (II) (Bayer)

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

Alias/See Also
CA 125 (serum);
CA-125 (Serum);
Cancer AB 125;
OC 125;
Ca 125 (serum)

CPT Codes

Preferred Specimen

Minimum Volume
1 mL

Avoid hemolysis. Allow to clot in an upright position for 30 minuties. Centrifuge 10 minutes. Keep tightly stoppered.

Transport Container
Original tube preferred, may be sent in a screw-top transfer tube.

Transport Temperature

Specimen Stability
Room Temperature = 8 hours
Refrigerated = 4 days
Frozen = n/a

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.


Setup Schedule

Report Available
1 day

Clinical Significance
The CA 125 level can provide prognostic information in the follow-up management of patients with ovarian carcinoma.The assay should be used as an adjunctive test in the management of ovarian cancer patients. CA 125 is not recommended as a cancer screening procedure to detect cancer in the general population.

Performing Laboratory
Compunet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439

Last Updated: November 19, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.