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.

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
CARNS
MiChart Code
Carnitine, Serum
Synonyms
  • CARNS
  • Carnitine, Serum
  • Acylcarnitine
  • Carnitine, Free and Total
  • AC/FC Ratio
  • L-Carnitine
Laboratory
Sendout
Reference Laboratory
Mayo CARNS (60449)
Section
Special Testing
Specimen Requirements
Collection

Collect specimen in a red top (preferred) or SST tube. Centrifuge, aliquot serum into a plastic vial and freeze.

Red Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Storage Temperature
Frozen: 60 days, Refrigerated: 21 days.
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