Quinidine, Serum
Order Code: MQUIN
Fee Code: AA351 (CPT 80194)
Reference Lab: Mayo QUIN
Due to limited utilization, Mayo Clinic Laboratories will make Quinidine, Serum (test code QUIN) obsolete effective November 6, 2025. The recommended alternative will be forwarded to LabCorp (test: Quinidine, Serum or Plasma - 007831).
Collection Instructions: Collect a red-top or green-top (heparin) tube. Do not use a gel-barrier tube. Transfer separated serum or plasma into a plastic transport tube. Specimen is stable at room temperature, refrigerated, and frozen for 14 days.
Peak: quinidine sulfate: 1.5 hours after dose, quinidine gluconate: 4 hours after dose.
Trough: immediately prior to next dose.
After change in dose: one to two days.
Reference Range: Therapeutic: 2.0-5.0 μg/mL