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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
ARUP Consult®
Disease Topics
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 NameLOINC
0050576Immunoglobulin G Subclass 42469-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Class 4 IgG
  • Gamma-globulins 4
  • IgG class 4
  • IgG Subclass 4