Prothrombin Time/International Normalized Ratio
0030224
Ordering Recommendation
 
Mnemonic
PT INR
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Sun-Sat
Reported
1-2 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Lt. blue (sodium citrate)  
Specimen Preparation
Transfer 1 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Serum. EDTA plasma, or hemolyzed specimens.  
Remarks
  
Stability
Ambient: 24 hours; Refrigerated: Unacceptable; Frozen: 2 weeks  
Reference Interval



       
 
Test Number Components Reference Interval
 International Normalized Ratio Coumadin Therapy:
  INR: 2.0-​3.0 conventional anticoagulation
  INR: 2.5-​3.5 intensive anticoagulation
 Prothrombin Time 12.0-​15.5 seconds
Interpretive Data
 
Note
Reference intervals established using 3.2 percent sodium citrate.
CPT Code(s)
85610
Components
Component Test Code*Component Chart NameLOINC
0030220Prothrombin Time5902-2
0030223International Normalized Ratio6301-6
* 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
  • INR
  • Pro Time
  • Protime
  • Protime, PT/INR
  • PT/International Normalized Ratio