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Factor IX, Activity
0030100
Ordering Recommendation

Order to diagnose factor IX deficiency (hemophilia B) and monitor factor IX replacement therapy.

Mnemonic
F9
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Mon-Sat
Reported
1-3 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
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. EDTA plasma, clotted or hemolyzed specimens. 
Remarks
 
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks 
Reference Interval
AgeReference IntervalAgeReference Interval
1-4 days15-91%7-9 years70-133%
5-29 days15-91%10-11 years72-149%
30-89 days21-81%12-13 years73-152%
90-179 days21-113%14-15 years80-161%
180-364 days36-136%16-17 years86-176%
1-5 years47-104%18 years and older78-184%
6 years63-89%

Interpretive Data


Note
CPT Code(s)
85250
Components
Component Test Code*Component Chart NameLOINC
0030100Factor IX, Activity3187-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Antihemophilic Factor B
  • Christmas Factor
  • Coagulation Factor IX Activity Assay, Plasma
  • Intrinsic Factor Proteins
  • Intrinsic Factors
  • Plasma Thromboplastin Component
  • PTC