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Test Code CA15 Cancer Antigen 15-3 (CA 15-3), Serum

Reporting Name

Cancer Ag 15-3, (CA 15-3), S

Useful For

Managing breast cancer patients when used in conjunction with clinical information and other diagnostic procedures


Serial testing can assist in early detection of disease recurrence in previously treated stage II and III breast cancer patients


Monitoring response to therapy in metastatic breast cancer patients

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Minimum Volume

0.45 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Frozen  90 days

Reference Values

Males: <30 U/mL (use not defined)

Females: <30 U/mL

Day(s) and Time(s) Performed

Monday through Friday; 5 a.m.-12 a.m.

Saturday; 6 a.m.-6 p.m.

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
CA153 Cancer Ag 15-3, (CA 15-3), S 6875-9


Result ID Test Result Name Result LOINC Value
CA153 Cancer Ag 15-3, (CA 15-3), S 6875-9

Reject Due To


Mild OK; Gross reject


Mild OK; Gross OK






Specimen Required


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 0.5 mL

Additional Instructions: 12 hours before this blood test do not take multivitamins or dietary supplements containing biotin or vitamin B7, which are commonly found in hair, skin, and nail supplements and multivitamins.

Method Name

Electrochemiluminescence Immunoassay