CA 19-9
Test Mnemonic
CA199
CPT Codes
- 86301 - QTY (1)
LOINC ®
24108-3
Aliases
- Cancer Antigen 19-9
- Carbohydrate Antigen 19-9
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Refrigerated |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 24 hours |
| Refrigerated | 7 days |
| Frozen | 6 months |
Days Performed
Mon - Fri
Turnaround Time
1 - 3 days
Methodology
| Name | Description |
|---|---|
| Immunoenzymatic Assay |
Reference Range
| CA 19-9 | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | < 36 | U/mL |
Special Info
The CA 19-9 Antigen test was performed using the Beckman Coulter Unicel DXI paramagnetic particle chemiluminescent immunoassay method. Results obtained with different assay methods or kits cannot be used interchangeably.
Clinical Info
Cancer antigen 19-9 test is used as an aid in monitoring response to treatment or recurrence in patients with established pancreatic, hepatobiliary, or gastrointestinal malignancies.
Clinical Limitation
Patients taking a Biotin dose of up to 5 mg/day should refrain from taking Biotin for 1 hour prior to sample collection. Patients taking a Biotin dose > 5 mg/day to 10 mg/day should refrain from taking Biotin for 2 hours prior to sample collection. Patients taking a Biotin dose > 10 mg/day should consult with their physician or the laboratory prior to having a sample taken. Clinicians should consider biotin interference as a source of error, when clinically suspicious of the laboratory result.