CA 19-9




Test Mnemonic

CA199

CPT Codes

  • 86301 - QTY (1)

LOINC ®

24108-3

Aliases

  • Cancer Antigen 19-9
  • Carbohydrate Antigen 19-9

Performing Laboratory

n/a


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLSerumSST (Gold) Refrigerated 

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.5 mL     

Stability

Environmental Condition Description
Ambient24 hours
Refrigerated7 days
Frozen6 months

Days Performed

Mon - Fri

Turnaround Time

1 - 3 days

Methodology

Name Description
Immunoenzymatic Assay 

Reference Range

CA 19-9
Sex Age From Age To Type Range Range Unit
   Years99 YearsNormal< 36U/mL

Special Info

The CA 19-9 Antigen test was performed using the Beckman Coulter Unicel DXI paramagnetic particle chemiluminescent immunoassay method. Results obtained with different assay methods or kits cannot be used interchangeably.

Clinical Info

Cancer antigen 19-9 test is used as an aid in monitoring response to treatment or recurrence in patients with established pancreatic, hepatobiliary, or gastrointestinal malignancies.

Clinical Limitation

Patients taking a Biotin dose of up to 5 mg/day should refrain from taking Biotin for 1 hour prior to sample collection. Patients taking a Biotin dose > 5 mg/day to 10 mg/day should refrain from taking Biotin for 2 hours prior to sample collection. Patients taking a Biotin dose > 10 mg/day should consult with their physician or the laboratory prior to having a sample taken. Clinicians should consider biotin interference as a source of error, when clinically suspicious of the laboratory result.