Section 504 of the Rehabilitation Act of 1973 promises equal opportunity for Americans with disabilities. It guarantees accommodations in federally-funded programs and services. You can file a 504 Plan in public schools to arrange accommodations for your child with celiac disease.
If you or one of your dependents has celiac disease and you itemize your deductions, the extra costs due to gluten-free dietary restrictions may be taken as a medical expense. In addition, you can deduct the cost of attending medical education conferences.
The US government offers benefits to Americans whose disability directly leads to them missing at least one year of work. If undiagnosed celiac disease prevented you from working for at least one year in the past, you may apply for benefits from that length of time.