Cancer Antigen-GI (CA 19-9), Body Fluid
Ordering Recommendation

Refer to for clinical indications and interpretive information.

Quantitative Electrochemiluminescent Immunoassay
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Biliary/Hepatic, CSF, Pancreatic, Peritoneal/Ascites, or Pleural fluid. 
Specimen Preparation
Centrifuge to remove cellular material. Transfer 1 mL body fluid to an ARUP Standard Transport Tube. (Min: 0.5 mL) 
Storage/Transport Temperature
Unacceptable Conditions
Specimen types other than those listed. Specimens too viscous to be aspirated by instrument. 
Specimen source must be provided
Ambient: 8 hours; Refrigerated: 5 days; Frozen: 3 months 
Reference Interval
Interpretive Data
The Roche CA 19-9 electrochemiluminescent immunoassay is used. Results obtained with different test methods or kits cannot be used interchangeably. The CA 19-9 value, regardless of level, should not be interpreted as absolute evidence of the presence or absence of malignant disease.

For information on body fluid reference ranges and/or interpretive guidance visit

Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Component Test Code*Component Chart NameLOINC
0020747Cancer Antigen GI (CA 19-9), Body Fluid26924-1
2013040Cancer Antigen-GI(CA19-9) Fluid Source31208-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
  • CA 19-9 body fluid
  • CA19-9 Abdominal Fluid
  • CA19-9 Ascites Fluid
  • CA19-9 Paracentesis Fluid