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HelpTest Code MG Magnesium
Useful For
Assessing muscle weakness, cramping, irregular heartbeats, renal failure, malnutrition, and preeclamptic patients.
Specimen Information
Obtain specimens using standard phlebotomy techniques.
No special patient preparation is necessary.
| Container | Specimen | Temperature | Collect Vol | Submit Vol | Min Vol | Stability |
| SST | Serum | Refrigerate | 4.0 mL | 1.0 mL | 0.6 mL | 7 days |
| Lithium Heparin | Plasma | Refrigerate | 4.0 mL | 1.0 mL | 0.6 mL | 7 days |
Reject Due To:
- Moderate or Marked Hemolysis
- Specimen unlabeled or mislabeled
Instrumentation / Method
Ortho Vitros XT 7600 / Colorimetric
Test Schedule / Analytical Time / Test Priority
Daily / Same Day / Available STAT
Reference Range
Male and Female:
1.6 - 2.3 mg/dL
FBC (OBGYN) range for patients receiving MG: 4.0 - 7.0 mg/dL
Critical Value(s):
Non-OBGYN: <1.0 or >4.7 mg/dL
OBGYN patients receiving MG: >7.0 mg/dL
CPT / LOINC / Order Code
| Meditech | Medent | LOINC | CPT |
| MGS | MGS | 19123-9 | 83735 |
| OBMGS | N/A | 19123-9 | 83735 |