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.
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
Frozen.  
Unacceptable Conditions
Serum. Refrigerated, clotted, 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 Name
0030220Prothrombin Time
0030223International Normalized Ratio
* 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
  • INR
  • Pro Time
  • Protime
  • Protime, PT/INR
  • PT/International Normalized Ratio