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Test Code C153 Cancer Antigen 15-3

Specimen Type



Mint green top with gel separator

Preferred Volume

3.5 mL

UCMC Collection Instructions

 Once per admit. If serial monitoring needed, Q daily.


Monday – Friday 7:00 a.m. – 6:00 p.m.

Turnaround Time

24 – 72 hrs

STAT Availability

Not Available

Test Usage

Immunological in vitro assay for quantitative determination of CA 15-3 in human serum and plasma to aid in the management of breast cancer patients. In conjunction with other clinical and diagnostic procedures, serial testing with the Elecsys CA 15-3 II assay is an aid
• in the early detection of recurrence in previously treated stage II and III breast cancer patients.
• for monitoring response to therapy in metastatic breast cancer patients.

Test Methodology

Roche Elecsys CA 15-3 II, Electrochemiluminescence Immunoassay (ECL)

Additional Information

The measured CA 15-3 value of a patient’s sample can vary depending on the testing procedure used. CA 15-3 values determined on patient samples by different testing procedures cannot be directly compared with one another and could be the cause of erroneous medical interpretations.

CPT Code


Test Includes

CA 15-3

Critical Results


Reference Range

<30 u/mL

Coverage Information

CMS has established a national coverage policy (NCD) for Medicare for this test as of November 25, 2002. Please document medical necessity. For more details click this link:



Minimum Volume

2 mL

Fee Code



CA 15-3