MAGNESIUM LEVEL

Test Code

LAB103

Quest Code

622

CPT Codes
83735

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Other Acceptable Specimens

Sodium heparin (green-top) tube • Lithium heparin (green-top) tube

Transport Container

Serum separator tube (SST)

Transport Temperature

Room temperature

Specimen Stability

Serum and plasma
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Anticoagulants other than heparin

Methodology
Spectrophotometry (SP)

Setup Schedule

Daily

Report Available

1 day

Reference Range

1.5-2.5 mg/dL

Clinical Significance

Magnesium measurements are used in the diagnosis and treatment of hypomagnesemia (abnormally low plasma levels of magnesium) and hypermagnesemia (abnormally high plasma levels of magnesium). Magnesium is decreased in chronic nephritis, acute pancreatitis, and alcoholic cirrhosis. It is increased in acute or chronic renal failure and Addison's Disease.

Performing Laboratory

Quest Diagnostics-Lenexa

10101 Renner Blvd

Lenexa , KS 66219-9752

Last Updated: August 13, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.