Factor IX, Activity
0030100
 
Ordering Recommendation
Order to diagnose factor IX deficiency (hemophilia B) and monitor factor IX replacement therapy.
Mnemonic
F9
Methodology
Clotting
Performed
Mon-Fri
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.  
Specimen Preparation
Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Serum. Non-frozen or hemolyzed specimens.  
Remarks
 
Stability
Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 2 weeks  
Reference Interval
1-4 days: 15-91%
5-29 days: 15-91%
30-89 days: 21-81%
90-179 days: 21-113%
180-364 days: 36-136%
1-5 years: 47-104%
6 years: 63-89%
7-9 years: 70-133%
10-11 years: 72-149%
12-13 years: 73-152%
14-15 years: 80-161%
16-17 years: 86-176%
18 years and older: 78-184%
Interpretive Data
Note
CPT Code(s)
85250
Components
Component Test Code*Component Chart Name
0030100Factor IX, Activity
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at interface.support@aruplab.com.
Cross References
  • Antihemophilic Factor B
  • Christmas Factor
  • Coagulation Factor IX Activity Assay, Plasma
  • Intrinsic Factor Proteins
  • Intrinsic Factors
  • Plasma Thromboplastin Component
  • PTC