CFX - Overview: Protein C Activity, Plasma

Test Catalog

Test Name

Test ID: CFX    
Protein C Activity, Plasma

Useful For Suggests clinical disorders or settings where the test may be helpful

As an initial test for evaluating patients suspected of having congenital protein C deficiency, including those with personal or family histories of thrombotic events


Because coagulation testing and its interpretation is complex, Mayo Medical Laboratories suggests ordering THRMP / Thrombophilia Profile.


Detecting and confirming congenital Type I and Type II protein C deficiencies, detecting and confirming congenital homozygous protein C deficiency, and identifying decreased functional protein C of acquired origin (eg, due to oral anticoagulant effect, vitamin K deficiency, liver disease, intravascular coagulation and fibrinolysis/disseminated intravascular coagulation.)

Special Instructions and Forms Library of PDFs including pertinent information and consent forms, specimen collection and preparation information, test algorithms, and other information pertinent to test

Method Name A short description of the method used to perform the test

Amidolysis of Chromogenic Substrate

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

Protein C Activity, P

Aliases Lists additional common names for a test, as an aid in searching

Functional Protein C
Protein C, Functional, Plasma