Test Details
Methodology
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Result Turnaround Time
4 - 9 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Test Includes
Creatinine, urine; methylmalonic acid, urine
Use
Diagnose cobalamin (vitamin B12) deficiency
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
References
Specimen Requirements
Specimen
Urine (random)
Volume
5 mL
Minimum Volume
0.6 mL
Container
Plastic urine container, no preservative
Stability Requirements
Temperature | Period |
---|---|
Room temperature | 14 days |
Refrigerated | 14 days |
Frozen | 19 days |
Freeze/thaw cycles | Stable x3 |
Reference Range
0.4−2.5 μmol/mmol crt
Storage Instructions
Room temperature
LOINC® Map
Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
---|---|---|---|---|---|---|
716365 | Methylmalonic Acid, Urine | 716348 | Methylmalonic Acid, U | umol/L | 32287-5 | |
716365 | Methylmalonic Acid, Urine | 716445 | MMA - Normalized | umol/mmol cr | 25116-5 | |
716365 | Methylmalonic Acid, Urine | 723281 | Creatinine(Crt), U | g/L | 2161-8 | |
Order Code | 716365 | |||||
Order Code Name | Methylmalonic Acid, Urine | |||||
Order Loinc | ||||||
Result Code | 716348 | |||||
Result Code Name | Methylmalonic Acid, U | |||||
UofM | umol/L | |||||
Result LOINC | 32287-5 | |||||
Order Code | 716365 | |||||
Order Code Name | Methylmalonic Acid, Urine | |||||
Order Loinc | ||||||
Result Code | 716445 | |||||
Result Code Name | MMA - Normalized | |||||
UofM | umol/mmol cr | |||||
Result LOINC | 25116-5 | |||||
Order Code | 716365 | |||||
Order Code Name | Methylmalonic Acid, Urine | |||||
Order Loinc | ||||||
Result Code | 723281 | |||||
Result Code Name | Creatinine(Crt), U | |||||
UofM | g/L | |||||
Result LOINC | 2161-8 |