Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB2648             Geisinger Epic ID: 48117

Specimen type:
Packed RBCs (preferred) or whole blood (also acceptable).
Preferred collection container:
Specimen required:
Packed RBCs: 0.5 mL; minimum 0.2 mL. Whole blood: 1.0 mL; minimum 0.5 mL.
Special notes:
Preferred specimen is packed RBCs in collected in EDTA (lavender or dark blue-top) tube. Whole blood collected in EDTA tube is also acceptable.
Patient preparation:
Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection.

Specimen processing instructions:
Do not centrifuge whole blood. Packed RBC cells: Centrifuge to separate plasma from RBCs and discard plasma. Transfer RBCs to a plastic transfer vial from a Quest Diagnostics (trace-element and metal-free) collection kit. 
Transport temperature:
Refrigerated (cold packs).
Specimen stability:
Packed RBCs: Room temperature: 7 days. Refrigerated: 7 days. Frozen: Unacceptable.
Whole blood: Room temperature: 4 days.Refrigerated: 7 days. Frozen: Unacceptable.
Rejection criteria:
Frozen specimen.

CPT code(s):
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Inductively Coupled Plasma-Mass Spectrometry
Quest test code 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.

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: Tues-Sat. Report availble 4 days.    
Performed STAT? No
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