aPTT

Test Code
LAB325 1230100232


Alias/See Also
PTT
APTT
ACTIVATED PROTHOMBIN TIME


CPT Codes
85730

Includes
ACTIVATED PARTIAL THROMBOPLASTIN TIME IN PPP BY COAGULATION ASSAY


Preferred Specimen
Plasma


Instructions
Fully collect a Blue Top (sodium citrate) tube. Underfilled tubes will not be accepted. Mix sample immediately by gentle inversion at least six times.


Transport Container
LT BLUE TOP-CITRATE


Transport Temperature
Refrigerated


Specimen Stability
If transport time will exceed four hrs, send platelet-poor plasma 2 to -20C or less.
To obtain platelet-poor plasma: centrifuge, separate plasma, recentrifuge, and separate plasma into a transport tube.


Reference Range
Result Checking Type Low (N) High (N) Numeric Range (N)
Reference Range 23.0 33.0 23.0-33.0
Abnormality - Critical    82.0 >=82.0


Performing Laboratory
MWH LAB SH LAB LH FSED MAIN LAB HC FSED Main Lab



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.