Drug Testing lab tests in Walk-In Lab Lab Test Test Cost Cholinesterase, RBC and Plasma Test $139.00 Methadone Blood Test $239.00 Digoxin Blood Test $92.00 Phenytoin (Dilantin) Blood Test $99.00 Sodium Urine Test, 24-Hour $39.00 Phenobarbital Serum Test $75.00 Trileptal (Oxcarbazepine) Serum Test $175.00 Valproic Acid Serum Test - Valproic Acid Test $99.00 Ethanol Blood Test $89.00 Nicotine and Expanded Metabolites Blood Test, LC/MS/MS $79.00 Sodium Urine Test, 24-Hour $39.00 Nortriptyline Serum Test $189.00 Cholinesterase Blood Test $129.00 Amiodarone Blood Test $99.00 Phenytoin (Dilantin) Blood Test $99.00 Lithium Serum Test $45.00 Lithium Serum Test - Lithium Blood Test $45.00 Beta-Hydroxybutyrate Blood Test $79.00 Valproic Acid Serum Test $99.00 Methadone Blood Test $239.00 Nortriptyline Serum Test $189.00 Carbamazepine (Tegretol) Serum Test $69.00 Cholinesterase Blood Test $129.00 Digoxin Blood Test $92.00 Tetanus Titer Blood Test $69.00 Theophylline Blood Test $119.00 Carbamazepine (Tegretol) Serum Test $69.00 Valproic Acid Blood Test, Free $158.00 Theophylline Blood Test $119.00 Carbohydrate-deficient Transferrin (CDT) Blood Test $109.00 Nicotine and Metabolite Urine Test, Quantitative, Random $149.00