Prothrombin Time Elevation Diagnostic Panel

Test Mnemonic


CPT Codes

  • 85390 - QTY (1)
  • 85384 - QTY (1)
  • 85610 - QTY (1)
  • 85730 - QTY (1)
  • 85611 - QTY (1)
  • 85670 - QTY (1)
  • 85379 - QTY (1)


  • Elevated PT Diag Panel

Performing Laboratory

Cleveland Clinic Laboratories

Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
4.5 mLPlasmaSodium citrate (Lt. Blue) FrozenPlease submit "Coagulation Consultation Patient History Form" with specimens.


Environmental Condition Description
Ambient4 hours
Frozen14 days at -20 C; 6 months at -70 C

Days Performed

Mon - Fri

Turnaround Time

3 - 5 days


Name Description
Refer to individual components 

Reference Range

APTT Screen
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal28.2-47.4sec
 1 Months3 MonthsNormal21.7-43.5sec
 2 Days5 DaysNormal22.9-52.0sec
 6 Days30 DaysNormal23.1-48.0sec
 4 Months11 MonthsNormal25.3-37.3sec
 1 Years5 YearsNormal21.3-31.6sec
 6 Years10 YearsNormal23.1-31.6sec
 11 Years16 YearsNormal23.1-32.5sec
 17 Years99 YearsNormal24.0-35.1sec
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal214 - 399mg/dL
 2 Days5 DaysNormal208 - 462mg/dL
 6 Days30 DaysNormal208 - 378mg/dL
 1 Months3 MonthsNormal137 - 379mg/dL
 4 Months11 MonthsNormal147 - 387mg/dL
 1 Years99 YearsNormal200 - 400mg/dL
   Years99 YearsUrgent< 100mg/dL
~      Urgent>999999mg/dL
~  Days2 DaysUrgent<=99mg/dL
~2 Days6 DaysUrgent<=99mg/dL
~6 Days1 MonthsUrgent<=99mg/dL
~1 Years999 YearsUrgent<=99mg/dL
~1 Months4 MonthsUrgent<=99mg/dL
~4 Months1 YearsUrgent<=99mg/dL
~      Critical<100mg/dL
PT 1:1 Mix
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal<14.9sec
 11 Years16 YearsNormal<11.2sec
 2 Days5 DaysNormal<14.3sec
 6 Days30 DaysNormal<13.4sec
 1 Months3 MonthsNormal<13.3sec
 4 Months11 MonthsNormal<13.0sec
 17 Years99 YearsNormal<13.1sec
 1 Years5 YearsNormal<10.7sec
 6 Years10 YearsNormal<11.3sec
PT Screen
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal< 14.9sec
 1 Months3 MonthsNormal< 13.3sec
 2 Days5 DaysNormal< 14.3sec
 6 Days30 DaysNormal< 13.4sec
 4 Months11 MonthsNormal< 13.0sec
 1 Years5 YearsNormal< 10.7sec
 6 Years10 YearsNormal< 11.3sec
 11 Years16 YearsNormal< 11.2sec
 17 Years99 YearsNormal< 13.1sec
Thrombin Time
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal< 17.3sec
 2 Days5 DaysNormal< 17.9sec
 6 Days30 DaysNormal< 17.9sec
 1 Months3 MonthsNormal< 18.2sec
 4 Months11 MonthsNormal< 19.1sec
 1 Years999 YearsNormal< 18.6sec

Special Info

Indicate clearly if patient is on heparin, coumadin, direct thrombin inhibitor or thrombolytic therapy. If tests are abnormal, the following tests may be added and billed: Fibrinogen Ag (CPT 85385), D-Dimer (CPT 85379), Reptilase (CPT 85635).

Clinical Info

Note: It is recommended that the abnormal PT be confirmed before ordering this panel. This panel is intended to assist in the diagnosis of coagulation disorders in patients with a prolonged PT, but normal PTT, whether or not there is a bleeding diathesis. Disorders that may be investigated include the extrinsic and common pathway factor deficiencies (factor II, V, VII, X and fibrinogen), coagulation factor inhibitors, non-specific inhibitors, vitamin K deficiency, hepatic coagulopathy, disseminated intravascular coagulation (DIC), hypofibrinogenemia, dysfibrinogenemia, or anticoagulant drug effects.