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HelpEpic Code LAB1230093 IgG Index Synthesis CSF Careset
Test Name Alias
.IgG Index Ser | .IgG Index Synth CSF | 11592 | 11593
Interface Order Alias
11593
Panel Information
IgG Index, Serum
IgG Index Synth, CSF
Specimen Requirements
Submit both of the following specimens:
Specimen Type: Serum
Container/Tube: Gold Top (Serum Separator Tube – Gel)
Volume: 1 mL (2 Gold Top tubes preferred)
Minimum volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Specimen Type: Cerebrospinal Fluid (CSF)
Container/Tube: Spinal Fluid Collection tube or pour-over tube
Volume: 1 mL
Minimum volume: 0.2 mL CSF
Collection Instructions: Centrifuge and analyze immediately upon arrival in the lab.
Special Instructions
Serum drawn within 72 hours of CSF collection is acceptable. Serum MUST be collected in order to calculate CSF IgG Index and Synthesis. 2 serum tubes are preferered.
Lab Staff Instructions
Lab Central Staff: All CSF specimens to Hematology first.
Specimen Stability
CSF
Ambient: 12 hours
Refrigerate: 3 days
Frozen: not recommended
Laboratory Retention: 30 days
Serum
Ambient: 12 hours
Refrigerate: 3 days
Frozen: aliquot and freeze for longer storage
Laboratory Retention: 72 hours
Test Frequency
Available daily, usual TAT 1 – 2 days
Reference Range
Albumin CSF
13.0 – 25.0 mg/dL
CSF IgG Index
0 – 0.7
CSF IgG Synthesis
0 – 3.3 mg/day
IgG CSF
0.5 – 5.9 mg/dL
Protein CSF
0 up to 10 Days: 40 – 120 mg/dL
10 Days up to 60 Days: 20 – 70 mg/dL
60 Days and up: 15 – 60 mg/dL
Performing Department
Chemistry
Performing Department Laboratory Location
Corewell Health Reference Laboratory, Grand Rapids, MI
Methodology
Immunoturbidimetric
CPT
82040, 82784, 82042, 82784, 84157
CDM Code
3018204201, 3018278403, 3018415701, 3018204201,3018278403
Epic Test ID
1230100138, 1230100139
Mayo Access Code
SHO11593
Reviewed Date
3/7/2024