Immunoglobulin G, CSF Index IGGSY

Method(s) Quantitative Immunoturbidimetry
Specimen Required
Collect

Cerebrospinal Fluid (CSF) and one 5 mL gold (SST) top tube. Serum specimen should be drawn within 48 hours of CSF collection.

Transport

1 mL CSF and 1 mL serum refrigerated. (Min: 0.5 mL CSF and 0.5 mL serum)

Stability

Ambient: Unacceptable; Refrigerated: 14 days; Frozen: 6 months (if frozen within 24 hours)

Unacceptable Conditions Grossly bloody or hemolyzed specimens.
Schedule Daily
Billing Code 5010306
CPTCode 82784 x2 Immunoglobulins; 82040 Albumin, serum; 82042 Albumin, CSF
Notes Separate serum from cells ASAP or within 2 hours of collection. Centrifuge and separate CSF to remove cellular material. To ensure accurate result interpretation, it is recommended that both CSF & serum specimens be collected on the same day. If specimens are not collected within this specified timeframe, it is advised to exercise caution when interpreting the results.
Preferred Specimen Collection Device(s)
Reference Interval
ComponentsReference Interval
Effective February 16, 2021
IgG, Serum0-2 years: 242-1108 mg/dL
3-4 years: 485-1160 mg/dL
5-9 years: 514-1672 mg/dL
10-14 years: 581-1652 mg/dL
15-18 years: 479-1433 mg/dL
19 years or older: 768-1632 mg/dL
IgG, CSF0.0-6.0 mg/dL
Albumin, Serum3500-5200 mg/dL
Albumin, CSF0-35 mg/dL
Albumin Index0.0-9.0
IgG Synthesis RateLess than or equal to 8.0 mg/d
IgG Albumin Ratio0.09-0.25
IgG Index0.28-0.66
No Appointment Necessary
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12 Patient Service Centers in Central New York.

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