Cortisol Binding Globulin
Test Mnemonic
CBG
CPT Codes
- 84449 - QTY (1)
Aliases
- Corticosteroid Binding Globulin
- Transcortin
Performing Laboratory
LabCorp
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | Red Plain | Frozen | Separate serum from cells within one hour of collection. Transfer specimen to a plastic transport tube before freezing. Separate specimens must be submitted when multiple tests are ordered. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | Gold SST | Frozen | Separate serum from cells within one hour of collection. Transfer specimen to a plastic transport tube before freezing. Separate specimens must be submitted when multiple tests are ordered. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 48 hours |
| Refrigerated | 48 hours |
| Frozen | 300 days |
Days Performed
Varies
Turnaround Time
7 - 11 days
Methodology
| Name | Description |
|---|---|
| Radioimmunoassay (RIA) |