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HelpTest Code LAB5047 Carbohydrate Antigen 19-9 (CA 19-9), Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Carbohydrate Ag 19-9, SSpecimen Type
SerumSpecimen Required
Patient Preparation: For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.6 mL
Collection Instructions:
1. Within 2 hours of collection, serum gel tubes should be centrifuged.
2. Within 2 hours of collection, red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial.
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Gross Icterus | OK |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 90 days | ||
| Ambient | 8 hours |
Specimen Minimum Volume
0.5 mL
Day(s) Performed
Monday through Saturday
Specimen Retention Time
14 daysReport Available
1 to 3 daysReference Values
<35 U/mL
Useful For
As a potential adjunct for diagnosis and monitoring of pancreatic cancer
Potentially differentiating patients with cholangiocarcinoma and primary sclerosing cholangitis (PSC) from those with PSC alone
CPT Code Information
86301
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CA19 | Carbohydrate Ag 19-9, S | 83084-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CA19 | Carbohydrate Ag 19-9, S | 83084-4 |
Forms
If not ordering electronically, complete, print, and send Oncology Test Request (T729)