UW Hospital and Clinics Lab Test Directory
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Methylmalonic Acid / Homocysteine
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| Test Code(s): |
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MMAHCY / HCMMAHCY
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| CPT Code(s): |
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83918, 82136
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| Testing Site: |
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Testing will be sent to an approved reference laboratory.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Instructions: |
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Intended for pediatric biochemical genetics patients only. For adult patients, see individual tests-Methylmalonic Acid (MMA) and Homocysteine (HCY)
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| Collection Container: |
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Preferred: Red top
Also Acceptable:
Green top (with sodium heparin anticoagulant)
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| Collection Volume: |
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Preferred: 4 mL
Pediatrics: 2 mL
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| Sample Analyzed: |
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Serum or plasma
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| Volume Required: |
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Preferred: 1 mL
Pediatrics: 0.2 mL
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| Outreach Specimen Transport: |
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Transport frozen aliquot to UWHC Core Laboratory (B4/220) on dry ice.
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| Stability: |
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Ambient: Not acceptable
Refrigerated: Not acceptable
Frozen: Acceptable
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Interpretation
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Vitamin B12 Deficiency Panel
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