Primidone (MYSO)

Test Code

LAB485

Quest Code

751

Alias/See Also

MYSO

CPT Codes
80188, 80184

Preferred Specimen

1 mL serum collected in a red-top tube (no gel)

Patient Preparation
Collect as trough just prior to next dose

Minimum Volume

0.2 mL

Other Acceptable Specimens

Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube

Instructions

Collect as trough specimen prior to next dose.

Transport Container

Transport tube

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Serum separator tube (SST) • Any serum collection tube with additives

Methodology
Immunoassay (IA)

Setup Schedule

Monday-saturday

Reference Range

Primidone	5.0-12.0 mg/L
Phenobarbital	15.0-40.0 mg/L

Performing Laboratory

Quest Diagnostics Nichols Institute-Chantilly VA

14225 Newbrook Drive

Chantilly, VA 20151-2228

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.