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. 

New York DOH Approval Status

This test is New York state 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

Methodology

Quantitative Immunoturbidimetry

Performed

Sun-Sat

Reported

1-3 days

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