Geisinger Medical Laboratories/Geisinger Proven Diagnostics Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  

VALPROIC ACID, TOTAL AND FREE

ORDERING INFORMATION:
Geisinger Epic Procedure Code: LAB1222         Geisinger Epic ID: 52813

SPECIMEN COLLECTION
Specimen type:
Serum (preferred) or plasma
Preferred collection container:
Alternate Collection Container:
3 mL lavender-top (K2 EDTA) tube
Specimen required:
3 mL serum (preferred) or plasma; minimum 1.5 mL
Special notes:
Do not use gel barrier tubes.
Patient preparation:
Collect as a trough just before next dose. Optimum time to collect sample: 1 hour before next dose.

SPECIMEN PROCESSING
Specimen processing instructions:
Centrifuge and immediately separate serum or plasma specimens from the cells into clean, plastic, screw-cap vial(s). 
Transport temperature:
Refrigerated (cold packs).
Specimen stability:
Room temperature: 48 hours. Refrigerated: 7 days. Frozen: 30 days.
Rejection criteria:
Do not use serum separator tubes. Submission of a serum separator tube will result in cancellation.

TEST DETAILS
CPT code(s):
80164, 80165
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Methodology:
Immunoassay
Synonyms:
Quest test code 6651, Valp Tot+Fr
Clinical significance:
Valproic acid is used as an anticonvulsant to treat certain types of seizures, to prevent migraine headaches, and to treat various psychiatric illnesses such as bipolar disorder and aggression. Drugs that compete for protein-binding sites with Valproic Acid, can increase the concentration of Valproic Acid. Therapeutic drug monitoring is useful to optimize dose. Measurement of the free concentration is useful if toxicity is suspected.

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: Mon-Sat; Report available: Next day    
Performed stat? No
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