Factor II, Activity (Prothrombin)
0030007
Ordering Recommendation
Evaluate for possible factor II deficiency.
Submit With Order
Mnemonic
F2
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: 26-70%
5-29 days: 33-93%
30-89 days: 34-102%
90-179 days: 45-105%
180-364 days: 60-116%
1-5 years: 71-116%
6 years: 67-107%
7-9 years: 78-125%
10-11 years: 78-120%
12-13 years: 72-123%
14-15 years: 75-135%
16-17 years: 77-130%
18 years and older: 86-150%
Interpretive Data
Note
Do not order for prothrombin mutation.
CPT Code(s)
85210
Components
Component Test Code*Component Chart Name
0030007Factor II, Activity (Prothrombin)
* 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.
Cross References
  • Coagulation Factor II Activity Assay, Plasma
  • Common Pathway Proteins, Factor II
  • FACTOR II ACTIVITY
  • Factor II, Plasma
  • Prothrombin