A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Phenytoin Level (Dilantin)

Test Code
LAB31


Alias/See Also
1231100123


CPT Codes
80185

Includes
PHENYTOIN LEVEL (DILANTIN)


Preferred Specimen
Green Lithium Heparin (Gel separator preferred)


Minimum Volume
0.5 mL plasma


Other Acceptable Specimens
NA HEP Green top tubes (Contact Lab)


Instructions
Specimen must be centrifuged within 2 hours after collection and plasma pulled off cells.


Specimen Stability
Room Temperature: 2 day
Refrigerated: 1 month


Methodology
Abbott Alinity

Reference Range
Males/Females:
10.0-20.0 ug/mL


Performing Laboratory
CONWAY LABORATORY FORT SMITH LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY EL DORADO LABORATORY DREW COUNTY LABORATORY


Last Updated: August 26, 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.