Immunoglobulin G Subclass 4

0050576
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Example Reports
Abnormal
Normal
Ordering Recommendation

Aid in diagnosis of immunodeficiencies. Secondary test in suspected immunoglobulin deficiency. Do not order before IgG, IgA, and IgM measurements are performed. 

Mnemonic
IGG4
Methodology

Quantitative Nephelometry

Performed

Mon-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: 0.45 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions
Remarks
Stability

After separation from cells: Ambient: 2 hours; Refrigerated: 8 days; Frozen: 6 months

Reference Interval

Effective February 16, 2016
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: 1-123 mg/dL
3-4 years: 0-90 mg/dL

Interpretive Data



Compliance Category

FDA

Note
Hotline History

View Hotline History

 

Hotline History

Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
05/20/2019
X
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