Amino Acid Analysis, Quantitative, Urine

Last Modified: 11/15/2021 8:11:20 AM

Medical Necessity Documentation:  
Client Notes:  
Patient Preparation:  
Specimen Requirements: 2.0 mL Random Urine in a Sterile Container
Collection Instructions:

No Preservatives

Provide patient age (required for correct reference range), sex, a brief clinical history, tentative diagnosis, and the therapy over the last three days (drugs, X-ray, infant formula, diet).

Quest Collection Instruction Sheet

Minimum Volume: 5.0 mL Urine
Transport & Storage: Temperature/Stability:

7 days Refrigerated
30 days Frozen

Avoid Thaw/Freeze Cycles

Rejection Criteria: Ambient; Urine with a pH less than 2.0
Reference Range:

Refer to Interpretive Results

Critical Ranges:  
Test Comments:  
Methodology: Liquid Chromatography/Mass Spectrometry (LC/MS)
Clinical Significance: Amino Acid Analysis, LC/MS, Urine - Amino acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to, phenylketonuria, tyrosinemia, citrullinemia, non-ketotic hyperglycinemia, maple syrup urine disease, and homocystinuria. The assay is also key for the continued monitoring of treatment plans for these disorders and useful for assessing nutritional status of patients. Our methodology is highly accurate at very low levels as well as at elevated levels
Custom Panel: No


Turn Around Time: 6 to 9 days
Days Performed: Monday, Wednesday, Friday
Sites Performed: Quest - Chantilly to San Juan Capistrano
PHL Test Code: MSOT
EPIC Test Code: MISC
Alternate Test Names: Amino Acid Analysis, LC/MS, Urine; Amino Acid Analysis, Quantitative, Urine; Amino Acid Analysis, LC/MS, Urine
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; Cystine; Ethanolamine; Gamma-Amino Butyric Acid; Glutamic Acid; Glutamine; Glycine; Histidine; Homocystine; Hydroxylysine; Hydroxyproline; Isoleucine; Leucine; Lysine; Methionine; Ornithine; Phenylalanine; Proline; Sarcosine; Serine; Taurine; Threonine; Tryptophan; Tyrosine; Valine; Creatinine Random Urine
CPT Coding: 82139, 82570

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