The Massachusetts Office on Disability (MOD) was created in 1981 under M.G.L. Chapter 6 Section 185.  The primary mission of MOD is to ensure the full and equal participation of all people with disabilities in all aspects of life by working to advance legal rights, maximum opportunities, supportive services, accommodations and accessibility in a manner that fosters dignity and self determination. It is the state advocacy agency that serves people with disabilities of all ages.

While MOD is a small agency with very limited resources, its output is significant. It is the designated agency to oversee and administer the Commonwealth's compliance with the Americans with Disabilities Act (ADA). It is the touchstone within government for technical assistance, trouble-shooting and advice on all disability related issues. It serves as ombudsman, conscience, facilitator and critic as major changes in state policies and services emerge while resources dwindle.

The Office has three main components that function to fulfill its priorities: the Government Services Program, the Client Services Program, and the Community Services Program. While each program is uniquely distinct, they intersect and interact with each other in order to effectively ensure that people with disabilities are treated fairly in the Commonwealth.