Test Overview
Test Methodology

Flow Injection Analysis-Tandem Mass Spectrometry (FIA-MS/MS)

Test Usage

Evaluation of patients with a clinical suspicion of a wide range of conditions including organic acidemias, fatty acid oxidation disorders, and primary carnitine deficiency.

Reference Range *

Interpretive report provided.

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

Test Limitations

Increased values may be obtained after carnitine supplementation or meat consumption.

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
CARN
MiChart Code
Carnitine, Plasma
Synonyms
  • Acylcarnitine
  • Carnitine, Free and Total
  • AC/FC Ratio
  • L-Carnitine
Laboratory
Sendout
Reference Laboratory
Mayo CARN (8802)
Section
Special Testing
Specimen Requirements
Collection

Collect specimen in a green top tube (preferred); lavender top tube is also acceptable. Centrifuge, aliquot plasma into a plastic vial and freeze.

Alternate Specimen
Lithium heparin green top and Lav top EDTA are acceptable,
Normal Volume

0.5 mL plasma

Minimum Volume

0.3 mL plasma

Additional Information

Test includes Total Carnitine, Free Carnitine, Acylcarnitine, and AC/FC Ratio. Test sent to Mayo Medical Laboratories.

Billing
CPT Code
82379
Fee Code
20459
LOINC
2043-8
NY State Approved
No