Valproic Acid, Total 
Mnemonic VALP T
CPT 80164
Test Code 8000900
Synonyms Depakote, Divalproex
Test Includes  
Specimen Serum
Volume 1.0 mL
Container SST or Red Top Tube
Special Instructions Collect trough sample just before the next scheduled dose. Collect peak sample 1 to 3 hours after a dose is given.
Specimen Prep Centrifuge* For Red Top only, transfer serum to Plastic Transport Tube
Storage Refrigerate
Transport Temp Refrigerated
Stability Rm Temp 2 days, capped
Stability Refrig 1 week, capped
Stability Frozen 1 month, capped
Methodology EMIT 2000
Rejection Criteria   
Reference Value 50 - 100 mg/L; Critical: ≥150 mg/L 
Performed/TAT Monday - Sunday