Test Code VALP VALPROIC ACID
Additional Codes
LAB25
Performing Laboratory
Porter Hospital Laboratory
Specimen Requirements
Specimen Type: Blood
Container/Tube: Tiger top, serum gel
Also Acceptable: Green top (Lithium Heparin)
Specimen Volume: Full tube, submit 0.4 mL serum
Specimen Minimum Volume: 0.35 mL
Collection Instructions:
1. Send specimen in original tube.
2. If there is a delay in transport of >1 hour, centrifuge tube.
3. Centrifuged samples are stable for:
• 8 hours at room temperature
• 2 days at 2 – 8º C
For longer storage, freeze at -20ºC or colder.
Specimen Transport Temperature
Refrigerated
Day(s) Performed
Daily; Available STAT
Test Classification and CPT Coding
80164
Normal Reference Values
50-100 mcg/mL
Critical Values
> 150 µg/mL