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Test Code CEAM Carcinoembryonic Antigen (CEA), Serum

Additional Codes



Reporting Name

Carcinoembryonic Ag (CEA), S

Useful For

Monitoring colorectal cancer and selected other cancers such as medullary thyroid carcinoma


May be useful in assessing the effectiveness of chemotherapy or radiation treatment


This test is not useful for screening the general population for undetected cancers.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Specimen Required


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 0.6 mL

Collection Instructions:

1. Serum gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

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

Reference Values

Nonsmokers: ≤3.0 ng/mL

Some smokers may have elevated CEA, usually <5.0 ng/mL.

Serum markers are not specific for malignancy, and values may vary by method.

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, approved or is exempt 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
CEA Carcinoembryonic Ag (CEA), S 83085-1


Result ID Test Result Name Result LOINC Value
CEA Carcinoembryonic Ag (CEA), S 83085-1

Reject Due To

Gross hemolysis Reject
Gross lipemia OK

Method Name

Immunoenzymatic Assay


If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.