Blood
Phenytoin
Also known as: Dilantin Level, Phenytoin Total
CONVERT & COMPARE
µg/mL
=
59.4
µmol/L
=
15
mcg/mL
=
15
ug/mL
=
59.4
umol/L
=
59.4
mcmol/L
Reference ranges by source
Published adult intervals: 3, from 3 named sources, shown in µg/mL.
Related biomarkers
More tests in the blood category.
Sources
Last updated 2026-05-02
This page presents source-specific reference data and sourced explanations. For general wellness information only. This is not medical advice. For diagnosis or treatment of any condition, talk to a qualified clinician.
Track your phenytoin in MyBloodTest
Save reviewed lab results and follow their history. Scanning requires sign-in and has plan-specific limits.
Open the web app
iOS · Android · Web