Health Lab

Use the rolodex controls or search box below to find tests. You can enter a test name, CPT code, test code, or alias in the search box.

A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Show All

<< Back To Search Results

Health Lab Test Code Build Information
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

	Excel \| PDF

	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.
Test Type:

Health Lab Test Code Build Information

FIND A HEALTHLAB LOCATION

LOCATION ADDRESS

HOURS OF OPERATION