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Test Code
VALP
Test Name
Valproic Acid
CPT Codes
80164
Expected Turnaround Time
Same day
Clinical Utility
Useful for monitoring therapy and assessing toxicity.
Specimen and Container Info

Specimen

Container

Volume**

 

Serum

Red Top, Plain*

1 mL

Serum

Gold Top, Serum Separator

3 mL

Plasma

Dark Green Top (Lithium Heparin)

1 mL

Plasma

Light Green Top, Plasma Separator

1 mL

Plasma

Gray Top (Sodium Fluoride, Potassium Oxalate)

1 mL

Plasma

Lavender Top (EDTA)

1 mL

*Preferred Specimen
Processing and Submission Instructions
  1. Centrifuge specimens for 5 minutes at 3000 rpm.
  2. Transfer serum or plasma to a plastic aliquot tube.
Transport Instructions

Transport to the laboratory refrigerated.
Stability Requirements

Refrigerated

  • Plasma or serum in an SST is stable up to 7 days.
  • Plasma or serum aliquot is stable up to 14 days.

Frozen

  • Plasma and serum aliquot is stable for 1 year.
Methodology
Enzyme Immunoassay (EIA)
Reference Intervals

Age Group

Reference Interval

Units

All Ages

50 - 100

µg/mL

 
Critical Values

Age Group

Critical Value

Units

All Ages

>= 125

µg/mL
Performing Location
Carbon Hospital, Dickson City Hospital, Hazleton Hospital, Pocono Hospital, Roble Road Core Laboratory, Schuylkill Hospital
Alternate Names
  • Depakene
  • Depakote
  • Valproate
Testing Schedule
Routine daily, STAT testing available
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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