Test Details

Mnemonic

UMMAG

Ordering Code

3719900

CPT-4 Code(s)

83921, 82570

Specimen Information

Collect

Random urine
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Specimen Preparation

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

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

0.6 mL
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Transport Temperature

Refrigerated
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Rejection Criteria

Specimens stored at room temperature, acidified urine
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Stability

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