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7558: IgG Synthesis Rate/Index, CSF Print View
Synthesis Rate IgG, CSF CALC    mg/24 h 
IgG Index, CSF CALC     
Albumin, CSF NEPH    mg/dL 
IgG, CSF NEPH    mg/dL 
Immunoglobulin G NEPH    mg/dL 
Albumin, Serum NEPH    g/dL 

PRIMARY
1 Serum 1 (0.5) mL   Room Temperature - 8 Hour(s)/Refrigerated - 7 Day(s)/Frozen - 3 Month(s)  
2 CSF 2 (1) mL   Frozen - 3 Month(s)/Refrigerated - 7 Day(s)/Room Temperature - 8 Hour(s)  
ALTERNATE

The IgG Synthesis Rate/Index is useful in diagnosing and monitoring patients with multiple sclerosis and other inflammatory diseases involving the brain and meninges.

It is preferred that the collection date and time be the same for
both CSF and serum; however, it is acceptable for them to be drawn
within 48 hours of each other. CSF must be clear. (CSF collection
tube #4 preferred.)

Reject Criteria: Received room temperature; hemolysis; xanthochromia
/RBCs/hemolysis in CSF
Setup Schedule
Monday-Saturday

Reported (Analytical Time)
Next day

CPT Codes
82042,82784x2,82040

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Transport Temperature: Refrigerated
Methodology: Nephelometry






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