Test Code LAB24 VALPROIC ACID TOTAL
Additional Codes
CPT Code: 80164
Methodology
Note: Order VA for valproic acid or DEPK for Depakene.
Performing Laboratory
Peninsula Regional Medical Center - Chemistry
Specimen Requirements
Submit only 1 of the following specimens:
Plasma
Draw blood in a green-top (lithium heparin) tube. (Hemolyzed specimen is not acceptable.) Spin down and send 2 mL of lithium heparin plasma.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Draw blood in a gold-top serum gel tube. (Hemolyzed specimen is not acceptable.) Spin down and send 2 mL of serum.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Reference Values
Therapeutic range: 50-100 mcg/mL
Critical value (automatic call-back): >150 mcg/mL