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Test Code MG Magnesium, Plasma or Serum

Additional Codes

LAB103

Performing Laboratory

Central Peninsula Hospital

Collection Method

Venipuncture

Container

Lt Green / Plasma Separator / Lithium Heparin

Specimen Type

Preferred

  • Plasma- Light Green Top (Lithium heparin)

 

Acceptable

  • Serum- Gold Top SST or Red Top

Minimum Volume

0.5ml

Specimen Stability

Ambient 7 days
Refrigerated (4°C to 8°C) 7 days
Frozen(-40°C to 0°C) 1 year

Reference or Target Ranges

Age Male Female
0 - 2 years 1.6 - 2.7 1.6 - 2.7
3 - 5 years 1.6 - 2.6 1.6 - 2.6
6 - 8 years 1.6 - 2.5 1.6 - 2.5
9 - 11 years 1.6 - 2.4 1.6 - 2.4
12 - 17 years 1.6 - 2.3 1.6 - 2.3
> 17 years 1.7 - 2.3 1.7 - 2.3

Reportable Units

mg/dL

Critical Value

≤ 1.0 or ≥ 4.7 mg/dl

Reasons for Rejection

Hemolysis Threshold 800 mg/dL
Icterus Threshold 60 mg/dL
Lipemia Threshold 2000 mg/dL
Other QNS, contaminated, improperly labeled, improper specimen type

Performance Information

Days and Time Performed 24/7
Expected Turn Around Time Stat: 1 hour
Routine: 4 hours
Stat Availability Yes
Performing Bench CPH Chemistry
Methodology/Method Description Roche Cobas

CPT Codes

83735

Last review/edit date

2025