Return to Test Directory
VALPROIC ACID, serum (087-0451)
Test Mnemonic:


Specimen Requirements:

Routine venipuncture. Collect sample immediately prior to next dose. Collect 7 mL of blood in red-topped tube. Do not use SST/serum separator tube.(Min.: 3 mL of blood).


Centrifuge specimen within 2 hours after collection. Remove serum from cellular material within 2 hours after collection. Place serum in labeled plastic transport tube. Refrigerate serum aliquot at 2-8°C.


Room Temperature 18–28 °C (64–82°F) ≤ 24 hours, Refrigerated 2–8°C (36–46°F) ≤14 days, and Frozen ≤ -20°C (≤ -4°F) ≤14 days

Causes for Rejection:

Blood collected in a SST/gel separator tube, gross hemolysis, improperly labeled specimen, improper storage/transport, and QNS specimen                 

Reference Range:

By report (reports may vary based on instrumentation, patient age and sex)

Turnaround Time:

Routine: 4 hours; STAT: 1 hour


Two-Point Rate


Clinical Chemistry

CPT 4 Code:



If applicable, state clinical information that is required to be provided with specimen.

When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
Return to Test Directory