$13 | CPT Code: 86780 | Serology Lab
Specimen collection guides
Methodology
- Treponema pallidum particle agglutination (TP-PA)
Acceptable specimen(s)
- A blood sample collected in a red top, tiger top, gold top, or other serum separator tube. Do not collect blood in tubes that contain anticoagulants.
- To avoid hemolysis, centrifuge blood within 72 hours of collection, no matter the storage temperature.
Specimen labeling
A minimum of two of the following are required on the specimen label:
- Patient first and last name
- Date of birth
- Medical record number (MRN) or patient identification (ID)
The following information is optional, but highly preferred:
- Collection date
- The chain of custody number, if ordered through LabOnline
The lab will not process samples without appropriate identifiers on the label. Be sure the information on the label matches what is listed on the test order.
Specimen stability
- Room temperature: 72 hours
- Refrigerated (2-8°C): Seven (7) days
- Frozen (≤ -20°C): 30 months
Turnaround time
- Five (5) business days.
- Results will be available in LabOnline.
Rejection criteria
- Incomplete or missing test order, incomplete specimen labeling, specimen collected in expired collection kits, hemolysis, lipemia, received out of hold time, received out of temperature.
Ordering in LabOnline
- Profile: STI, Serology
- Testing type: Syphilis TP assay
- Matrix: Blood
Supplemental information
- None
Additional sample submission information
Contact information
- Client services: cdphe_labcoordinators@state.co.us
- Serology Lab: cdphe_serology_lab@state.co.us