Gas Chromatography (GC)
Suggested CPT Code(s)
New York State Approval Status


Turnaround Time

4 days (If Positive: 11 days)

Test Includes
1 Amitriptyline Elavil®; Endep® Gas Chromatography (GC) ng/mL 10 Antidepressant
2 Nortriptyline Amitriptyline Metabolite; Aventyl®; Pamelor® Gas Chromatography (GC) ng/mL 10 Antidepressant

Reflex Tests
Test Code Test Name
5446SP Amitriptyline and Metabolite Confirmation (Qualitative), Serum/Plasma
Compliance Statement
This test was developed and its performance characteristics determined by NMS Labs. It has not been cleared or approved by the US Food and Drug Administration.
Sample Type
Serum or Plasma
Requested Volume
5 mL
Minimum Volume
2.4 mL
Special Handling
Promptly centrifuge and separate Serum or Plasma into a plastic screw capped vial using approved guidelines.
Sample Container
Plastic container (preservative-free)

Additional Collection Instructions

Transport Temperature
Light Protection
Not Required
Rejection Criteria
Received Room Temperature. Polymer gel separation tube (SST or PST).

Rejection criteria pertain to clinical sample submissions only.

Room Temperature: 2 day(s)
Refrigerated: 30 day(s)
Frozen (-20 °C): 30 day(s)

The CPT Codes provided in this document are based on AMA Guidelines and are for informational purposes only. NMS Labs Does not assume responsibility for billing errors due to Reliance on the CPT Codes listed in this document.

*The information contained in this document represents database configurations, as they will appear on the effective date listed above.