Reply To: Insurance Required IG Blood Test

The term “IG test” is too vague. There needs to be more detail specified to fully understand what they are looking for and what conditions might affect results. Perhaps the following info can help you understand the questions to ask:
http://primaryimmune.org/about-primary-immunodeficiencies/specific-disease-types/igg-subclass-deficiency
https://labtestsonline.org/understanding/analytes/immunoglobulins/tab/test