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Test Code LAB6762 Methylmalonic Acid, Urine

Aliases

MMA, Urine

Performing Section

Biochemical Genetics

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.

TAT

7 days

CPT

83921

Special Collection Notes

May squeeze from cotton balls placed in diaper.
No preservatives

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.

Temperature

Frozen (dry ice)

Sample Stability

Refrigerated: 24 hours
Frozen @-20 Celsius: 30 days
Frozen @ -80 Celsius: Indefinitely

Test/Batch Schedule

Tue and Thur

Test Components

Methylmalonic Acid, Urine

Reference Range

0.0-4.6 mcg/mg UCr