Phenytoin (Dilantin®), Plasma or Serum

Test Code

PTN - NOCO

CPT Codes
80185

Preferred Specimen

1.0 ml plasma from Green top (Lithium Heparin)

Minimum Volume

0.5 mL
Note: For neonate requirements see Neonate Minimum Blood Volumes

Other Acceptable Specimens

1.0 ml serum from Serum Gel or Red Top

Specimen Stability

Temperature	Time
Refrigerated	4 days

*Centrifuge and aliquot into a plastic vial.

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis

Methodology
KIMS

Setup Schedule

Monday through Sunday; Continuously

Report Available

Same day

Reference Range

Therapeutic concentration: 10-20 µg/mL

Critical value (automatic call-back): >30.0 µg/m

Performing Laboratory
Banner Fort Collins Medical Center Laboratory
McKee Medical Center Laboratory
North Colorado Medical Center Laboratory

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.