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.
Alternate Specimen
SST tube is acceptable
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