F_9 - Overview: Coagulation Factor IX Activity Assay, Plasma

Test Catalog

Test Name

Test ID: F_9    
Coagulation Factor IX Activity Assay, Plasma

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

Diagnosing deficiencies, particularly hemophilia B (Christmas disease)


Assessing the impact of liver disease on hemostasis


Investigation of a prolonged activated partial thromboplastin time

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

See Hemophilia Testing Algorithm in Special Instructions.

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

Activated Partial Thromboplastin Clot-Based Assay

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


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

Coag Factor IX Assay, P

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

Factor IX - Off hours order 399
Factor IX Activity Assay
Hemophilia B