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METHYLMALONIC ACID
Number 631
CPT Code 83918
Alias MMA
Specimen Container SST
Specimen Type Serum
Turn Around Time
Days Performed
Reference Range 0-378 nmol/L
Alternate Specimen Green top heparin tube
Volume 1 mL Serum
Stability Ambient 14 Days
Stability Refrigerated 14 Days
Stability Frozen 19 Days
Patient Preparation
Methodology
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Limitations
Rejection Criteria
Plasma from a light blue-top or yellow-top tube; citrate interferes with assay
Additional Instructions
Performing Laboratory Reference Laboratory
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