CA 19-9 (Carbohydrate Antigen 19-9)
Order Name
CA 19-9
Test Number: 2024050
Revision Date 10/28/2025
Test Number: 2024050
Revision Date 10/28/2025
| 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. |
| Notes | Testing performed via Abbott Alinity Immunoassay method. Results obtained with different assay methods should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor each patient's course of therapy. |
| 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 |
| Lab Section | Chemistry |