Methylmal Acid & Homocystine METHHCYS

Synonyms

Allscripts (AEHR) Order Name

Methylmalonic Acid and Homocysteine, Serum

Sunrise Clinical Manager (SCM) Order Name

Methylmal Acid & Homocysteine

EPIC Order Name

Methylmalonic Acid (MMA) and Homocysteine

Clinical Info

Screen patients who may be at risk for heart disease and stroke
To diagnose and monitor vitamin B12 (cobalamin) deficiency.

Specimen Type

Blood

Container

Gold Top Tube

Collection Instructions

Container/Tube: Gold top tube or Red Top Tube
Specimen: 4 ml serum ( 1.6 mL min)
Centrifuge the specimen as soon as possible after complete clot formation has taken place.
Transport Temperature: Refrigerated

Note: Separate within one Hour of the draw

Transport Instructions

Refrigerated

Specimen Stability

14 Days Room Temperature
14 Days Refrigerated
19 Days Frozen - Homocysteine
6 Months Frozen- Methylmalonic Acid

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)- Methylmalonic Acid
Enzymatic- Homocysteine

Days Performed

TAT: 4-7 Days

Performing Laboratory

LabCorp

CPT

83090
83921

PDM

5909830

Result Interpretation

 
Methylmalonic Acid:  0 - 378 nmol/L

Homocysteine

Age

Male (µmol/L)

Female (µmol/L)

0 to 6 m

0.0–11.5

0.0–11.5

7 m to 1 y

0.0–10.0

0.0–10.0

2 to 12 y

0.0–9.0

0.0–9.0

13 to 17 y

0.0–11.0

0.0–11.0

18 to 60 y

0.0–14.5

0.0–14.5

61 to 70 y

0.0–17.2

0.0–17.2

71 to 80 y

0.0–19.2

0.0–19.2

>80 y

0.0–21.3

0.0–21.3

 

Forms

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