| Test Name: |
MAGNESIUM, RBC |
| Test Code: |
2197962 |
| Alias: |
623
LAB104
Mg, RBC
|
| CPT Code(s): |
83735
|
| Preferred Specimen: |
1 mL whole blood
OR
0.5 mL packed RBCs |
| Container: |
EDTA Lavender
|
| Alternate Container: |
EDTA Royal Blue |
| Minimum Volume: |
0.5 mL whole blood
OR
0.2 mL packed RBCs |
| Collection Instructions: |
Whole blood: Draw blood in a lavender-top EDTA tube. Invert to mix with preservatives. |
| Transport Temperature: |
Refrigerated |
| Stability: |
Room temperature: 4 days
Refrigerated: 7 days
Frozen: Unacceptable |
| Limitations: |
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes. |
| Schedule: |
Set up: Tuesday – Saturday
Report available: 5 days |
| Method: |
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) |
| Performing Lab: |
Quest Diagnostics, Chantilly #623 |
| Clinical Significance: |
Magnesium is an essential trace element. Deficiency leads to irritability, neuromuscular abnormalities, cardiac and renal damage. Its salts are used as antacids and cathartics. Excessive amount may cause CNS depression, loss of muscle tone, respiratory and cardiac arrest. |
| Use: |
Updated: 12/10/2025 |
| Reference Ranges: |
4.0-6.4 mg/dL |
|
The CPT codes included in this publication are in accordance with Current Procedural Terminology, a publication of the American Medical Association. CPT codes are provided here for the convenience of our clients; however, correct coding often varies from one carrier to another, and HealthLab may bill specific carriers using codes other than those shown. Clients who bill for services should verify the code(s) with the applicable payor to confirm that their use is appropriate in each case.
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| Test Type: |
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