Test Code 11_IS Factor XI Inhibitor Screen
Method Name
Only orderable as part of a profile. For more information see F11IS / Coagulation Factor XI Inhibitor Screen, Plasma.
Optical Clot-Based
Reporting Name
Factor XI Inhib ScrnSpecimen Type
Plasma Na CitSpecimen Minimum Volume
2 mL
Specimen Stability Information
Specimen Type | Temperature | Time |
---|---|---|
Plasma Na Cit | Frozen | 14 days |
Reference Values
Negative
Only orderable as part of a profile. For more information see F11IS / Coagulation Factor XI Inhibitor Screen, Plasma.
Day(s) and Time(s) Performed
Monday through Friday
Performing Laboratory

Test Classification
This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
85335
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
11_IS | Factor XI Inhib Scrn | 3224-3 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
7804 | Factor XI Inhib Scrn | 80603-4 |
Specimen Required
Only orderable as part of a profile. For more information see F11IS / Coagulation Factor XI Inhibitor Screen, Plasma.
Useful For
Detecting the presence and titer of a specific factor inhibitor directed against coagulation factor XI.