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Cancer Antigen 19-9 Test (CA 19-9)

  • Direct-to-consumer lab testing; No doctor referral or insurance necessary

  • 2,000+ conveniently located CLIA-certified U.S. labs

  • Comprehensive and easy-to-use website

  • Outstanding customer service

  • 110% price guarantee

  • Results in 1-3 days

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About Our Cancer Antigen 19-9 Test (CA 19-9)

Note: Fasting is not required for this test.

Cancer Antigen 19-9 (CA 19-9) is a used as a tumor marker in the detection of pancreatic or gastrointestinal cancer. This blood test detects Cancer Antigen 19-9 levels.


CA 19-9 is found in small amounts in the blood of healthy individuals. Elevated levels may indicate pancreatic cancer.

High CA 19-9 levels are most commonly associated with pancreatic cancer, other cancers, such as colorectal, lung and gallbladder cancers, can also cause elevated levels. Additionally, high CA 19-9 levels do not always indicate cancer. Elevated CA 19-9 levels can also be caused by non-cancerous conditions like gallstones, a blockage of the bile duct (jaundice), pancreatitis, cystic fibrosis and liver disease.



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