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Lab Test Dictionary

Methylmalonic Acid (MMA) Analysis, Quantitative


Gas Chromatography/Mass Spectrometry

Specimen Type

Serum or Plasma

Performing Lab

UCSD Biochemical Genetics

Epic ID


Lab Test Days


Standard TAT

7-9 Days

Stat TAT

4 Days

Collection Information

Specimen Required

4 mL Blood

Container Type

Light Green (Lithium Heparin PST)

Collection Instructions

Plasma collected in sodium heparin (green-top) tube is also acceptable. Serum collected in a red-top or serum separator tube (SST) is also acceptable but only as an alternative if needed.

Processing Information - Lab Use Only

Transport Temperature


Test Volume Required

2 mL Plasma

Minimum Test Volume

1 mL Plasma

Processing Instructions

Centrifuge, separate serum or plasma within 20 minutes, and promptly freeze. Complete UCSD Biochemical Genetics requisition and submit with specimen frozen.


Included in Organic Acid Comprehensive, Quantitative. Quantitation of MMA excretion can be used to follow the clinical status and therapeutic response of patients with methylmalonic acidemia.

CPT Codes