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HelpTest Code LAB6762 Methylmalonic Acid, Urine
Aliases
MMA, Urine
Performing Section
Biochemical Genetics
Purpose/Principle
Methylmalonic acidemias are characterized by the accumulation and excretion of methylmalonic acid. This method measures the amount of methylmalonic acid present using stable isotope dilution methodology.
Special Collection Notes
May squeeze from cotton balls placed in diaper.
No preservatives
Specimen Type
Urine:
Sterile Container
Specimen Volume
Preferred: 4.0 mL
Minimum: 1.5 mL
Processing Instructions
Store and ship sample frozen on dry ice.
Temperature
Frozen (dry ice)
TAT
7 days
Test Components
Methylmalonic Acid, Urine
CPT
83921
Sample Stability
Refrigerated: 24 hours
Frozen @-20 Celsius: 30 days
Frozen @ -80 Celsius: Indefinitely
Test/Batch Schedule
Tue and Thur
Reference Range
0.0-4.6 mcg/mg UCr