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St. John Health System
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Index:

CA 19-9 (Carbohydrate Antigen 19-9)

Order Name CA 19-9
Test Number: 2024050
Revision Date 04/17/2019
Test Name Methodology LOINC Code
CA 19-9 (Carbohydrate Antigen 19-9)
Chemiluminescence Assay 24108-3 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2mL (1mL) Serum Clot Activator SST Refrigerated
Alternate 1 2mL (1mL) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Instructions Stability: Ambient 1 day. Refrigerated 7 days. Frozen > 7 days.
Unacceptable: gross hemolysis
GENERAL INFORMATION
Testing Schedule Mon-Fri 
Expected TAT 1-3 days 
Clinical Use Potentially useful adjunct for diagnosis and monitoring of pancreatic cancer. 
CPT Code(s) 86301
Internal Comments 4/13/17 - Added uancceptable specimen per Shannon in Chem - JLS
7/14/17 updated stability - JK
12/20/17 added 24108-3 - JK
5/22/18 removed
Re-baseline Order Code ( 2024051 ) Re-Baseline: CA 19-9   /   Result Code ( 2024051 ) RB CA 19-9
6/14/18
Due to limited refrigerated stability, please submit frozen specimens. Stability: Ambient=8 hours; Refrigerated=48 hours; Freeze if testing cannot be started within 48 hours to Stability: Ambient 1 day. Refrigerated 7 days. Frozen > 7 days. - JK
4/17/19 change temp from ref/froz to just refrig - JK
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Chemistry