also known as Protein S Free Ag actual/normal in Platelet poor plasma by Immunoassay
| # | Retailer | Lab | Seen | Price | |
|---|---|---|---|---|---|
| 1 | DirectLabscheapest via Quest Diagnostics · seen today | Quest Diagnostics | today | $139 | order → |
| 2 | Jason Health via Quest · seen today | Quest | today | $935 | order → |
| 3 | LabsMD seen today | — | today | $1,308 | order → |
| Prothrombin Time (PT) (INR) | 10 retailers | $15 |
| Fibrinogen Activity | 9 retailers | $29.95 |
| D-Dimer | 6 retailers | $40 |
| Protein C Antigen | 5 retailers | $109 |
| Prothrombin Time - PT + Partial Thromboplastin Time - PTT Test | 5 retailers | $43 |
| Partial Thromboplastin Time (PTT) Blood Test | 4 retailers | $10 |
| PTT-LA with Reflex to Hexagonal Phase Confirmation Test | 4 retailers | $59.95 |
| von Willebrand Factor Antigen Test | 4 retailers | $265 |