Intrinsic Pathway Coagulation Factor Profile (Esoterix)

CPT: 85240; 85250; 85270; 85280
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Test Details

Test Includes

Factor VIII activity; factor IX activity; factor XI activity; factor XII activity



Specimen Requirements


Plasma, frozen


Two tubes of 1 mL each

Minimum Volume

1.5 mL


Blue-top (sodium citrate) tube


Plasma must be separated from cells within 45 minutes of venipuncture. Send plasma in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.

Storage Instructions



Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
500705 Intrinsic Pathway Coag Factor 500666 Factor VIII Activity % 3209-4
500705 Intrinsic Pathway Coag Factor 500672 Factor IX Activity % 3187-2
500705 Intrinsic Pathway Coag Factor 500674 Factor XI Activity % 3226-8
500705 Intrinsic Pathway Coag Factor 500367 Factor XII Activity % 3232-6

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CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at