Home
HelpTest Code 443492170 Magnesium, Red Blood Cell
Additional Codes
Quest Diagnostics Test Code: 623
Performing Laboratory
Quest Diagnostics Valencia Nichols Institute
27027 Tourney Road
Valencia, CA 91355-5386
Change of reference lab 12/27/2019
Specimen Requirements
Patient Preparation
Patient should refrain from taking vitamins, or mineral herbal
supplements for at least one week before sample collection
Preferred Specimen(s)
0.5 mL packed cells collected in an EDTA (lavender-top or dark
blue-top) tube
Alternative Specimen(s)
1 mL whole blood collected in: EDTA (lavender-top) tube or EDTA
(royal/dark blue-top) tube
Minimum Volume
0.2 mL RBCs • 0.5 mL whole blood
Specimen Transport Temperature
Refrigerated (cold packs)
Specimen Stability
EDTA packed cells
Room temperature: 7 days
Refrigerated: 7 days
Frozen: Unacceptable
EDTA whole blood
Room temperature: 4 days
Refrigerated: 7 days
Frozen: Unacceptable
Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)
Reference Range
See Report
Day(s) Test Set Up/TAT
Set up: Tues-Sat; Report Available: 4-5 days
CPT Code
83735