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Test ID FCYNB Cyanide, Blood Test

Specimen Required

Container/Tube: Gray top (potassium oxalate/sodium fluoride)

Specimen volume: 2 mL

Collection instructions: Collect 2 mL whole blood in potassium oxalate/sodium fluoride Gray top tube, send frozen.

Method Name

High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Reporting Name

Cyanide, Blood

Specimen Type

Whole Blood NaFl-KOx

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood NaFl-KOx Frozen (preferred) 90 days
  Refrigerated  7 days

Reference Values

Normal: Up to 0.05 mcg/mL

Potentially toxic: 0.50 mcg/mL and greater

Potentially lethal: 2.0 mcg/mL and greater

Day(s) Performed

Monday through Sunday

Report Available

11 to 13 days

Performing Laboratory

NMS Labs

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FCYNB Cyanide, Blood 5634-1


Result ID Test Result Name Result LOINC Value
Z5239 Cyanide 5634-1
Z5240 Reporting Limit 19147-8

Test Classification

This test was developed and its performance characteristics determined by NMS Labs. It has not been cleared or approved by the U.S. Food and Drug Administration.