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Tube Type

Test ID   LAB30
EPIC Order
CPT Code(s)   80184
Group/Individual Test   Individual
Laboratory   Core Laboratory
Tube Station   STAT: 888; Routine: 30
Specimen Routine: 2 mL blood/royal blue top tube
  micro: 300 µL blood/red top pediatric bullet; see Comments for important information
Unspun - 4 hrs
Spun and Separated Room Temp - 48 hrs
Spun and Separated Refrigerated - 7 days
Spun and Separated Frozen - 2 months
Availability 24 hrs/day
Turnaround Time   Routine: 2 hours; STAT: 1 hour
Reference Range Therapeutic: 15-40 µg/mL (trough)
  Toxic: >40 µg/mL
Comments Collection information: Red Top Pediatric Tubes must NOT contain Serum Separator Gel.
Trough samples are used for routine monitoring; collect sample immediately before next

Reviewed by D. Burton on December 16, 2019

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514