Test Directory
4305 Cancer Antigen 19-9 (CA 19-9)
Specimen Type
Specimen Stability
Reference Range
Serum-SST
7 days 2-8°C
0-35 U/mL
Specimen Requirements
Preferred amount: 1.0 mL Serum
Minimum amount: 0.5 mL Serum
Minimum amount: 0.5 mL Serum
Method
Immunochemiluminometric (ICMA)
Schedule
Mon-Fri
Turn-Around Time
24hrs
Instructions/Notes
Centrifuge required?: Yes
Clinical Utility
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.
CPT Codes
86301
