Days Set Up
Daily, 24 hours
Analytic Time
2 hour
MiChart Code
Phenytoin Level, Total
Soft Order Code
DIL
Test Updated:
Synonyms
Dilantin
Diphenylhydantoin
Epanutin
DIL
DILANTIN LEVEL
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Test Overview
Test Methodology
Kinetic Immunoassay (KIMS)
Test Usage
Monitor therapeutic drug level, compliance, evaluate phenytoin toxicity
Reference Range
Therapeutic Levels: 10-20 mcg/mL (adults), 5-20 mcg/mL (children), Toxic levels: greater than 30 mcg/mL.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Billing Information
CPT Code
80185
Pro Fee Code
LOINC
3968-5