Carbohydrate Antigen 19-9 (CA 19-9)
Label Mnemonic: CA199
Epic Lab Code: LAB2792
Downtime Form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Chemistry
6240 RCP
356-3527
Specimen(s):
Plasma
Collection Medium:
Plasma Separator Tube 4.5 mL
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
3 mL whole blood in light green top tube or TWO Microtainer® devices
Delivery Instructions:
Deliver to laboratory within 1 hour of collection.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
0.0 - 34 U/mL
Comments:
This assay may be significantly impacted by high-dose biotin (>5 mg dose) taken within previous 12 hours. High concentrations of biotin may lead to falsely decreased results. These concentrations may be found in patients taking over-the-counter supplements with biotin content much higher than nutritional requirements for biotin. Specimens should not be collected until at least 12 hours after the last dose.
Test Limitations:
Hemolysis=2200, Icterus=66, Lipemia=1500
Methodology:
Electrochemiluminescence Immunoassay (ECL)
CPT Code:
86301
 
See Additional Information:
Biotin Interference with Immunoassays