Magnesium

Cleveland HeartLab M, Test

NEW YORK DOH APPROVED: YES
CPT Code: 83735
Order Code: C150
ABN Requirement:  No
Synonyms: Mg; Mag
Specimen: Serum
Volume: 0.5 mL
Minimum Volume: 0.2 mL
Container: Gel-barrier tube (SST, Tiger Top)

Collection:

  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 5 times immediately after draw. DO NOT SHAKE.
  3. Allow blood to clot 30 minutes.
  4. Centrifuge at 1300 rcf for 10 minutes.

Transport: Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab, Inc. shipping box.

Stability:

Ambient (15-25°C): 7 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C): 1 year
Deep Frozen (-70°C): 1 year

Causes for Rejection: Specimens other than serum; improper labeling; samples not stored properly; samples older than stability limits

Methodology: Enzymatic Colorimetric Assay

Turn Around Time: 1 to 3 days

Reference Range:

Age mg/dL
All Ages 1.7-2.6

 

Critical Value:

Age Critical Low mg/dL Critical High mg/dL
All Ages ≤1.0 ≥4.8

 

Intended Use: Magnesium testing is used for the evaluation of kidney disorders, electrolyte balance and hypokalemia.

Limitations: In very rare cases gammopathy may cause unreliable results.

The CPT codes provided 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 payer being billed.