Test Overview

Test Methodology

Liquid Chromatography with Tandem Mass Spectrometry (LC/MS-MS)

Test Usage

Monitoring possible exposure to cyanide; establishing cause of death in cyanide exposure.

Reference Range*

Normal: Up to 0.05 mcg/mL
Potentially toxic: 0.50 mcg/mL and greater
Potentially lethal: 2.0 mcg/mL and greater

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Not useful for monitoring nitroprusside therapy; the Thiocyanante assay is the preferred test for monitoring nitroprusside therapy.

Test Details

Days Test Performed

Daily

Analytic Time

7 - 11 days

Soft Order Code

FCYNB

MiChart Code

Cyanide Level

Synonyms

Synonyms

Amygdalin
Laetrile
CYAN
CYANIDE, BLOOD

+ See More

Laboratory

Sendout

Laboratory Reference

Mayo FCYNB (NMS 1380B)

Looking to Order a Test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Specimen Requirements

Offsite Collection Instructions

Collect blood in a gray top tube. Send intact whole blood FROZEN.

Normal Volume

2 mL whole blood

Minimum Volume

0.5 mL whole blood

Additional Information

Test sent to Mayo Medical Laboratories; performed by NMS Labs.

Billing Information

Fee Codes


CPT Code

82600

Have More Billing Questions?

Explore our helpful billing resources:

Billing Resources


Billing FAQ