Useful For

There are two possible tests for Protein C Antigen depending on the Coumadin medication status of the patient. It is important to order the appropriate test as described below.

When the patient has:
1. Received NO Coumadin for the past two weeks, See 'Protein C Antigen, No Coumadin' (PCAGSO)
2. On a STABLE Coumadin dose for at least two weeks, see ' Protein C Antigen, ON Coumadin' (PROT-CM)

Consult Hematology/Coagulation pathologist as needed (Marshfield Labs).