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Specimen Collection Manual and Test Catalog

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OXALATE, SERUM/PLASMA

Geisinger Epic Procedure Code:  LAB4222    Geisinger Epic ID:  176170

SPECIMEN COLLECTION
Specimen type: 

Serum or plasma


Preferred collection container: 
Alternate collection container: 
3 mL lavender-top (K2 EDTA) tube
4 mL green/green-top (sodium heparin) tube
Specimen required: 

2 mL serum or plasma, minimum 0.7 mL



SPECIMEN PROCESSING
Processing instructions: 

Centrifuge, aliquot, and freeze immediately.


Transport temperature: 

Frozen.


Specimen stability: 

Room temperature: Unacceptable. Refrigerated: 14 days. Frozen: 30 days.


Rejection criteria: 

Received room temperature • Received refrigerated • Sodium fluoride/potassium oxalate (gray-top) tube • Serum Separator Tube (SST) • Polymer gel separation tube (PST)



TEST DETAILS
CPT code(s):  83945
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.

Methodology: 
Enzymatic Assay (AZA)
Synonyms: 

Quest test code 5390


Clinical significance: 

Overexposure/Poisoning Determination; Biomarker


Review Date:  12/19/2024

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