For purposes of monitoring exposures to organophosphate and carbamate pesticides, testing both RBC and serum/plasma cholinesterase is recommended
Enzymatic Assay (EZA)
Suggested CPT Code(s)
New York State Approval Status


Turnaround Time

7 days

Test Includes
1 Cholinesterase Enzymatic Assay (EZA) IU/L 4000 Biological Marker (Exposure)

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.
Specimen Type
Requested Volume
1 mL
Minimum Volume
0.2 mL
Special Handling
Collect sample in Lavender top tube (EDTA) or Pink top tube. Promptly centrifuge and separate RBCs into a plastic screw capped vial within two hours of collection using approved guidelines.
Specimen Container
Plastic container (preservative-free)

Additional Collection Instructions

Transport Temperature
Light Protection
Not Required
Rejection Criteria

Rejection criteria pertain to clinical specimen submissions only.

Room Temperature: 14 day(s)
Refrigerated: 14 day(s)
Frozen (-20 °C): 14 day(s)
1 Cholinesterase Enzymatic Assay (EZA) IU/L 4000 Biological Marker (Exposure)

Interface Map

LOINC® Information

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.