Carnitine Panel
Ordering Recommendation
Tandem Mass Spectrometry
Tue, Thu, Sat
2-7 days  
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Green (sodium or lithium heparin). Also acceptable: Plain red.  
Specimen Preparation
Separate plasma or serum from cells ASAP or within 2 hours of collection. Transfer 0.5 mL serum or plasma to an ARUP Standard Transport Tube and freeze immediately. (Min: 0.2 mL) Avoid hemolysis.  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Room temperature specimens. Specimens that have been refrigerated for greater than 12 hours. Grossly hemolyzed specimens.  
Clinical information is needed for appropriate interpretation. Additional required information includes age, gender, diet (e.g., TPN therapy), drug therapy, and family history. Biochemical Genetics Patient History Form is available on the ARUP Web site at or by contacting ARUP Client Services.  
After separation from cells: Ambient: Unacceptable; Refrigerated: 12 hours; Frozen: 1 month  
Reference Interval
Reports include age appropriate reference interval and interpretation.
Test Number Components Reference Interval
0080067Carnitine, Total  
Age Total Carnitine
1-​31 days 21-​83 µmol/L
32 days-​12 months 38-​73 µmol/L
13 months-​6 years 35-​90 µmol/L
7 years-​20 years 31-​78 µmol/L
21 years or older 34-​86 µmol/L
0080065Carnitine, Free Effective May 16, 2011
Age Free Carnitine
1-​31 days 15-​55 µmol/L
32 days-​12 months 29-​61 µmol/L
13 months-​6 years 25-​55 µmol/L
7 years-​20 years 22-​63 µmol/L
21 years or older 25-​60 µmol/L
 Carnitine, Esterified Effective February 18, 2014
Age Esterified Carnitine
1-​31 days 4-​29 µmol/L
32 days-​12 months 7-​24 µmol/L
13 months-​6 years 4-​36 µmol/L
7 years-​20 years 3-​38 µmol/L
21 years or older 5-​29 µmol/L
 Carnitine, Esterified/Free RatioEffective February 18, 2014
Age Ratio Esterified/Free
1-​31 days 0.2-​ 0.8
32 days-​12 months 0.1-​ 0.8
13 months-​6 years 0.1-​ 0.8
7 years-​20 years 0.1-​ 0.9
21 years or older 0.1-​1.0
 Acylcarnitine, Plasma InterpretationBy Report
Interpretive Data

See Compliance Statement B:
Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
The concentration of esterified carnitine is derived from a mathematical calculation using free and total carnitine.
CPT Code(s)
82017; 82379
Component Test Code*Component Chart Name
0040029C5-OH, 3-OH Isovaleryl
0040034Acylcarnitine, Plasma Interpretation
0040037C2, Acetyl
0040038C3, Propionyl
0040039C4, Iso-/Butyryl
0040042C5, Isovaleryl/2Mebutyryl
0040046C5-DC, Glutaryl
0040047C6, Hexanoyl
0040049C8, Octanoyl
0040054C8:1, Octenoyl
0040057C10, Decanoyl
0040058C10:1, Decenoyl
0040062C12, Dodecanoyl
0040063C12:1, Dodecenoyl
0040064C12-OH, 3-OH-Dodecanoyl
0040066C14, Tetradecanoyl
0040067C14:1, Tetradecenoyl
0040068C14:2, Tetradecadienoyl
0040069C14-OH, 3-OH-Tetradecanoyl
0040074C14:1-OH, 3-OH-Tetradecenoyl
0040076C16, Palmitoyl
0040077C16:1, Palmitoleyl
0040078C16-OH, 3-OH-Palmitoyl
0040079C16:1-OH, 3-OH-Palmitoleyl
0040087C18, Stearoyl
0040093C18:1, Oleyl
0040094C18:2, Linoleyl
0040097C18-OH, 3-OH-Stearoyl
0040098C18:1-OH, 3-OH-Oleyl
0040101C18:2-OH, 3-OH-Linoleyl
0080066Carnitine, Free
0081108Carnitine, Total
0081291Carnitine, Esterified
0081292Carnitine Esterified/Free (Ratio)
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
  • carnitine panel, plasma
  • plasma carnitine panel