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HelpTest Code MG Magnesium
Useful For
Determination of magnesium is useful in assessing several diseases and conditions. High magnesium is associated with uremia, dehydration, diabetic acidosis, Addison’s disease, and increased medicinal intake of magnesium, such as in the treatment of preeclampsia (hypertension induced by pregnancy). Low magnesium is associated with malabsorption syndrome, acute pancreatitis, hypoparathyroidism, chronic alcoholism and delirium tremens, chronic glomerulonephritis, aldosteronism, digitalis intoxication, and protracted I. V. feeding.
Synonyms/Keywords
Mg, Serum
Specimen Requirements
| Fasting Required |
Specimen Type |
Preferred Container/Tube | Acceptable Container/Tube | Specimen Volume | Specimen Minimum Volume (allows for 1 repeat) |
Pediatric Minimum Volume (no repeat) |
|---|---|---|---|---|---|---|
| No | Plasma/Serum | Lithium-heparin Plasma Separator (PST), Serum Separator Tube (SST) | Lithium or Sodium-heparin Green Top (GTT), Red Top Tube (RTT) | 1.0 mL | 0.3 mL | 0.4 mL whole blood |
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma/Serum | Ambient | 5 days |
| Refrigerate | 7 days | |
| Frozen | 1 year |
Rejection Criteria
| Grossly hemolyzed specimens |
|---|
| Samples collected with EDTA, Potassium Oxalate/Sodium Fluoride |
Interferences
Hemolysis will cause falsely elevated results
Reference Range Information
| Performing Location | Reference Range |
|---|---|
| All Performing Sites | 1.7 - 2.4 mg/dL See Critical Value List for list of current critical values |
Marshfield Labs Performing Department
Marshfield Labs Chemistry
Performing Information
| Performing Location | Day(s) Test Performed | Analytical Time | Methodology/Instrumentation |
|---|---|---|---|
| Beaver Dam | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Weston | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Eau Claire | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Park Falls | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Ladysmith | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Rice Lake | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Marshfield | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Minocqua | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Neillsville | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Stevens Point | Monday through Sunday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
| Wisconsin Rapids | Monday through Friday | Less than 2 hours | Xylildyl Blue Endpoint Assay/Beckman AU |
CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 83735 | 1 |
Outreach CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 83735 | 1 |
Ordering Applications
| Ordering Application | Description |
|---|---|
| Cerner | Magnesium Level |