Ordering Recommendation

Refer to aruplab.com/bodyfluids for clinical indications and interpretive information.

New York DOH Approval Status

This test is New York state approved.

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


Quantitative Electrochemiluminescent Immunoassay




Within 24 hours

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 https://aruplab.com/bodyfluids/

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0020747 Cancer Antigen GI (CA 19-9), Body Fluid 26924-1
2013040 Cancer Antigen-GI(CA19-9) Fluid Source 31208-2
* 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
Cancer Antigen-GI (CA 19-9), Body Fluid