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.
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
Age | Reference Interval | Age | Reference Interval |
---|---|---|---|
1-4 days | 15-91% | 7-9 years | 70-133% |
5-29 days | 15-91% | 10-11 years | 72-149% |
30-89 days | 21-81% | 12-13 years | 73-152% |
90-179 days | 21-113% | 14-15 years | 80-161% |
180-364 days | 36-136% | 16-17 years | 86-176% |
1-5 years | 47-104% | 18 years and older | 78-184% |
6 years | 63-89% |
Interpretive Data
Compliance Category
Standard
Note
Hotline History
N/A
CPT Codes
85250
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0030100 | Factor IX, Activity | 3187-2 |
* 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
Factor IX, Activity