Test Details

Mnemonic

UMMAG

Ordering Code

3719900

CPT-4 Code(s)

83921, 82570

Specimen Information

Collect

Random urine

Specimen Preparation

Mix well and send 1.7 mL urine with no preservatives in a screw capped plastic urine container.

Alternate Specimen

24-hour urine, catheterized urine, first void clean catch urine, random clean catch urine

Minimum Volume

0.6 mL

Transport Temperature

Refrigerated

Rejection Criteria

Specimens stored at room temperature, acidified urine

Stability

Room temperature: 4 days
Refrigerated: 12 days
Frozen (-20°C): 30 days
Frozen (-70°C): 90 days

Methodology

Gas Chromatography/Tandem Mass Spectrometry
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Reference Range

Result Name Age Reference range Unit of measure
Methylmalonic Acid, GCMSMS, U 0.3-2.2 mol/mol creat
Creatinine, Random urine 0-6 months 0.18-2.48 mmol/L
Creatinine, Random urine 7-11 months 0.18-2.74 mmol/L
Creatinine, Random urine 1-2 years 0.18-9.72 mmol/L
Creatinine, Random urine 3-8 years 0.18-11.49 mmol/L
Creatinine, Random urine 9-12 years 0.18-14.14 mmol/L
Creatinine, Random urine >12 years 1.77-23.31 mmol/L
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Performing Laboratory

Quest SJC
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