91018      Amitriptyline + Nortriptyline
Specimen:
  Collect: One 10 mL Red Top

Also Acceptable
One 4 mL Lavender (EDTA)
One 4 mL Green Top (Na Heparin)
One 4 mL Gray Top 
  Submit: 2 mL (Min:1 mL) Serum. Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable
2 mL (Min:1 mL) Plasma. Submit Refrigerated. Submit in a Standard Transport Tube. 
  Rejection Criteria: Use of separator tubes 
  Stability: Ambient: 5 Day(s); Refrigerated: 2 Week(s); Frozen: 6 Month(s); Incubated: Unacceptable 
Methodology: High performance liquid chromatography (HPLC) 
Performed: Mon-Fri 
Reported: 2-5 Day(s) 
CPT Codes:
80152 - TDM Amitriptyline80182 - TDM Nortriptyline
Interpretive Data: Please see report for interpretive data.
Components:
93258 - TOTAL 93259 - AMITRIPTYLINE
93271 - NORTRIPTYLINE