CA 19-9

Cleveland Heartlab C, Test


CPT Code: 86301
Order Code: 4698
ABN Requirement:  No
Synonyms: Carbohydrate Antigen 19-9; Cancer Antigen 19-9
Specimen: Serum
Container: Gel-barrier tube (SST, Tiger Top)
Volume: 1.0 mL
Minimum Volume: 0.5 mL


  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 10 times immediately after draw. Do not shake.
  3. Allow at least 30 minutes, and up to 60 minutes, from patient draw and ensure a complete clot has formed before placing the specimen in the centrifuge.
  4. Centrifuge sample for 15 minutes.

Transport: Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions included with the provided shipping box.


Ambient (15-25°C): 7 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C): 28 days

Causes for rejection: Specimens other than serum; improper labeling; samples not stored properly; samples older than stability limits

Methodology: Immunoassay (IA)

Turn Around Time: 2 to 3 days

Reference Range: <34 U/mL

This test was performed using the Siemens chemiluminescent method. Values obtained from different assay methods cannot be used interchangeably. CA 19-9 levels, regardless of value, should not be interpreted as absolute evidence of the presence or absence of disease.

Clinical Information: A large percentage of patients with gastrointestinal tumors (such as pancreatic, liver, gastric, colorectal tumors) and some other malignancies have been shown to have elevated serum CA 19-9 levels. Serum CA 19-9 levels may be useful for monitoring disease activity or predicting relapse following treatment. CA 19-9 should not be used as a screening test.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.