0050576
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Immunoglobulin G Subclass 4

IGG4
Example Reports
Abnormal
Normal

Ordering Recommendation

Aid in diagnosis or monitoring of IgG4-related disease. 

Methodology

Quantitative Immunoturbidimetry

Performed

Sun-Sat

Reported

1-3 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Serum separator tube.

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Grossly hemolyzed or lipemic specimens

Remarks
Stability

After separation from cells: Ambient: Unacceptable; Refrigerated: 14 days; Frozen: 6 months

Reference Interval

Effective February 16, 2021
0-2 years: 1-34 mg/dL                      
3-4 years: 1-65 mg/dL                         
5-9 years: 0-168 mg/dL                         
10-14 year: 1-103 mg/dL                    
15-18 years: 2-170 mg/dL                              
19 years and older: 1-123 mg/dL

Interpretive Data



Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

82787

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Components

Component Test Code* Component Chart Name LOINC
0050576 Immunoglobulin G Subclass 4 2469-5
* 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
Immunoglobulin G Subclass 4