Amino Acid Analysis

Last Modified: 10/4/2019 9:15:23 AM

Medical Necessity Documentation:  
Client Notes:  
Patient Preparation:

Overnight Fasting Required (or at least 4 hours after last meal).

Non fasting samples only acceptable for pediatric patients

Specimen Requirements: 2.0 mL Plasma from a Green Top Tube - Na Heparin in a Plastic Vial
Collection Instructions: Plasma should be separated from cells as soon as possible after collection or within 30 minutes of draw

Freeze plasma immediately after separating at below -20° C. 

Patient age is required for correct reference range.
Minimum Volume: 0.25 mL Plasma
Transport & Storage: Temperature/Stability: 7 days Refrigerated
30 days Frozen
Rejection Criteria: Gross hemolysis • Received room temperature
Reference Range:

Refer to Interpretive Results

Critical Ranges:  
Test Comments:  
Methodology: Liquid Chromatography/Mass Spectrometry (LC/MS)
Clinical Significance: Amino acids serve many functions including as building blocks for proteins, neurotransmitters, precursors to hormones, and enzyme co-factors. More than 70 disorders of amino acid metabolism have been described. The clinical manifestations of these disorders are diverse.
Documentation: Medical Justification: Elevated blood levels of and/or increased excretion of amino acids are seen in association with inborn errors of metabolism and renal tubular disorders. Screening for qualitative patterns of amino acid excretion may be helpful in diagnosis
Custom Panel: No


Turn Around Time: 4 to 7 days
Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Sites Performed: Quest - Chantilly to San Juan Capistrano
PHL Test Code: AAA
EPIC Test Code: LAB2633
Send Out Test Code: 767
Alternate Test Names: Amino Acid Analysis, LC/MS, Plasma
Included Tests:
1-Methylhistidine; 3-Methylhistidine; Alanine; Alpha-Amino Adipic Acid; Alpha-Amino Butyric Acid; Arginine; Asparagine; Aspartic Acid; Beta-Alanine; Beta-Amino Isobutyric Acid; Citrulline; Cystathionine; Ethanolamine; Gamma-Amino Butyric Acid; Glutamic Acid; Glutamine; Glycine; Histidine; Homocystine; Hydroxyproline; Isoleucine; Leucine; Lysine; Methionine; Ornithine; Phenylalanine; Proline; Sarcosine; Serine; Taurine; Threonine; Tryptophan; Tyrosine; Valine
CPT Coding: 82139

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