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PHENYTOIN
Test CodePTN
Alias/See Also
DILANTIN
CPT Codes
80185
Preferred Specimen
1.0 mL serum collected in a Red top (No Gel) tube
Minimum Volume
0.1 mL
Other Acceptable Specimens
Plasma- Lithium Heperin (PST)
Plasma- Sodium Heperin
Plasma- EDTA (Lavender)
Serum- Red Top
Serum- SST or Tiger Top
Plasma- Sodium Heperin
Plasma- EDTA (Lavender)
Serum- Red Top
Serum- SST or Tiger Top
Specimen Stability
Room Temperature: 4 days at 20-25°C
Refrigerated: 4 days at 2-8°C.
Frozen: 1-2 months at -20 °C. Freeze only once.
Refrigerated: 4 days at 2-8°C.
Frozen: 1-2 months at -20 °C. Freeze only once.
Last Updated: October 22, 2021