Immunoglobulin G Subclass 4
0050576
Ordering Recommendation
 
Mnemonic
IGG4
Methodology
Quantitative Nephelometry
Performed
Mon-Sat
Reported
1-3 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Serum separator tube or green (sodium or lithium heparin).  
Specimen Preparation
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.45 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
  
Remarks
  
Stability
After separation from cells: Ambient: 2 hours; Refrigerated: 8 days; Frozen: 6 months  
Reference Interval
Cord blood: 1-47 mg/dL                        5-6 years: 2-116 mg/dL
0-2 months: 1-33 mg/dL                        7-8 years: 0-138 mg/dL
3-5 months: 1-14 mg/dL                        9-10 years: 1-95 mg/dL
6-8 months: 1-16 mg/dL                        11-12 years: 1-153 mg/dL
9-23 months: 1-65 mg/dL                      13-14 years: 2-143 mg/dL
2 years: 0-120 mg/dL                              15 years and older: 7-89 mg/dL
3-4 years: 0-90 mg/dL  
Interpretive Data
 
Note
 
CPT Code(s)
82787
Components
Component Test Code*Component Chart Name
0050576Immunoglobulin G Subclass 4
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Aliases
  • Class 4 IgG
  • Gamma-globulins 4
  • IgG class 4
  • IgG Subclass 4