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916: Valproic Acid Print View
Valproic Acid IA  50 - 100  mg/L 

PRIMARY
1 Serum Red Top 1 (0.2) mL   Refrigerated - 7 Day(s)/Room Temperature - 5 Day(s)/Frozen - 30 Day(s)  
ALTERNATE
  Plasma Citrated 1 (0.2) mL   Refrigerated - 7 Day(s)/Room Temperature - 5 Day(s)/Frozen - 30 Day(s)  
  Plasma EDTA 1 (0.2) mL   Room Temperature - 5 Day(s)/Frozen - 30 Day(s)/Refrigerated - 7 Day(s)  
  Plasma, Sodium Fluoride 1 (0.2) mL   Room Temperature - 5 Day(s)/Frozen - 30 Day(s)/Refrigerated - 7 Day(s)  
  Plasma Potassium Oxalate 1 (0.2) mL   Frozen - 30 Day(s)/Refrigerated - 7 Day(s)/Room Temperature - 5 Day(s)  
  Sodium Heparin   Frozen - 30 Day(s)/Room Temperature - 5 Day(s)/Refrigerated - 7 Day(s)  
  Lithium Heparin   Refrigerated - 7 Day(s)/Frozen - 30 Day(s)/Room Temperature - 5 Day(s)  

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.

Patient Preparation: Collect as a trough just prior to next dose.

Do not use gel barrier tubes. Centrifuge and immediately separate
serum or plasma specimens from the cells into clean, plastic,
screw-capped vial(s). Do not use serum separator tubes (SST).
Submission of a serum separator tube will result in cancellation.
Setup Schedule
Tuesday-Saturday

Reported (Analytical Time)
Same day

CPT Code
80164

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Transport temperature: Room temperature Reject Criteria: Serum separator tube






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