Vaccine information, visitor restrictions, and additional resources | Medicaid: The program is changing and you must take steps to keep your UNC Health providers

Phenytoin (Dilantin)

No Gel in Red Top Bullet

Tube Type

Test ID   LAB31
EPIC Order
CPT Code(s)   80185
Group/Individual Test   Individual
Laboratory   Core Laboratory
Tube Station   Routine: 30; STAT: 888
Specimen Routine: 3 mL blood/royal blue top tube ONLY; see Comments for additional information
  micro: 300 µL blood/red top pediatric bullet; see Comments for additional information
Unspun - 4 hrs
Spun and Separated Room Temp - 8 hrs
Spun and Separated Refrigerated - 1 week
Spun and Separated Frozen - 12 weeks
Availability 24 hrs/day
Turnaround Time   STAT: 1 hr; Routine: 2 hrs
Reference Range Therapeutic: 10-20 mcg/mL (Trough, Steady state)
  Toxic: >20 mcg/mL
Comments Red Top Pediatric Tubes must NOT contain Serum Separator Gel
Collection information: For oral dose, collect as trough immediately before next dose.

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