Phenytoin

Test Code

PHENYTOIN (DILANTIN)

Alias/See Also

Dilantin
Chemistry

Preferred Specimen

Plain Red Top Tube

Minimum Volume

2 mL

Transport Temperature

Refrigerate

Specimen Stability

Room temperature: 2 days
Refrigerated (2-8°C): 8 days. Separate if not tested within this time.
Frozen (-20°C or colder): 5 months
Max freeze/thaw cycles: 5

Methodology
EIA

Setup Schedule

Daily

Report Available

TAT 1 day

Reference Range

10.0 - 20.0 ug/mL

Clinical Significance

Phenytoin is an anticonvulsant hydantoin used for the treatment of generalized tonic-clonic (grand mal) and complex partial seizures. Phenytoin is also used for prophylaxis in neurosurgical procedures. Phenytoin levels are monitored to assure adequate therapeutic levels are achieved and to avoid toxicity.

Performing Laboratory
Test performed in these BACL Chemistry Labs
Contact: Jonathan Dryjowicz-Burek, West Roxbury 857-203-5973
Alternate contact Joseph A. Manzone JP 857-364-5092

Last Updated: May 17, 2022

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.