Valproic Acid Drug Level
Label Mnemonic: VALP
Epic code: LAB25
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
6240 RCP
Collection Medium:
Plasma Separator Tube 4.5 mL
Alternate Collection Media:
Call laboratory for additional acceptable specimen collection containers.
3 mL whole blood in light green top tube or ONE Microtainer®.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around Time:
1 hour (upon receipt in laboratory)
Reference Range:
50-100 μg/mL

Critical value: >150 μg/mL
Test Limitations:
Criterion: recovery plus or minus 10% of initial value at 
concentrations of 50 μg/mL and 100 μg/mL.

Icterus: No significant interference from bilirubin up to an I index 
30 (approximate bilirubin concentration: 30 mg/dL).

Hemolysis: No significant interference from hemoglobin up to an H 
of 500 (approximate hemoglobin concentration: 500 mg/dL).

Lipemia (Intralipid): No significant interference up to an L index of 
500 (approximate triglycerides concentration: 1000 mg/dL). There is 
poor correlation between turbidity and triglycerides concentration.

No significant interference from total protein of 2-12 g/dL.
Homogenous Enzyme Immunoassay
CPT Code:
See Additional Information:
Chemistry Critical Lab Values