Laboratory Services

Magnesium

Updated Test Information:

Test Description

Magnesium

Synonym(s)

Test ID

General Information

Numerous studies have shown a correlation between magnesium deficiency and changes in calcium‑, potassium‑ and phosphate‑homeostasis which are associated with cardiac disorders such as ventricular arrhythmias that cannot be treated by conventional therapy, increased sensitivity to digoxin, coronary artery spasms, and sudden death. Additional concurrent symptoms include neuromuscular and neuropsychiatric disorders. Hypermagnesemia is found in acute and chronic renal failure, magnesium excess, and magnesium release from the intracellular space.

Specimen Type

Serum

Alternate Specimen Type

Red, Li-heparin plasma

Specimen Requirements

SST

Minimum Sample Volume

1 mL

Pediatric Min. Volume (if applicable)

500 uL

Stability

7 days at 15‑25 °C
7 days at 2‑8 °C
1 year at (-15)‑(-25) °C

Methodology

Colorimetric

Estimated TAT

0-2 days

Testing Schedule

Monday-Saturday

CPT Code(s)

83735

Reference Range

Serum/plasma

Newborn	1.5‑2.2 mg/dL
5 months‑6 years	1.7‑2.3 mg/dL
6‑12 years	1.7‑2.1 mg/dL
12‑20 years	1.7‑2.2 mg/dL
20-60 years	1.6‑2.6 mg/dL
60‑90 years	1.6‑2.4 mg/dL
> 90 years	1.7‑2.3 mg/dL

Performing Lab

Incyte Diagnostics

LOINC Code(s)

19123-9