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MIXING STUDY, APTT

Message
Collect a full tube to the fill line, following standard venipuncture techniques. Do not over or under fill tubes as the ratio of blood to anticoagulant (9: 1) is necessary for accurate results. Gently Invert the tube three or four times immediately after venipuncture to ensure proper mixing of blood and anticoagulant.


Test Code
LAB326 PTTXG


Alias/See Also
PTTXG


CPT Codes
85732

Instructions
Minimum Testing Volume: 1 ml citrated plasma Transport Temperature: Frozen Stability: Ambient: 2 hoursRefrigerated : UnacceptableFrozen: (-20°C) 2 weeks Causes for Rejection: Specimens submitted Refrigerated or greater than 2 hours after collection at room temperature, are short draws, clotted or have excessive hemolysis, icterus or lipemia.


Report Available
STAT 24-Hours|Routine 24-Hours|Timed 24-Hours


Clinical Significance
1230140073



Last Updated: May 18, 2026


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.