Start with the documented admissions route
Review MVBH admissions, then use contact MVBH to raise document questions connected to accessibility needs.
The verified starting point is a call to 978-233-9597 for a confidential conversation. The facts do not state that an accessibility document is always required. They also do not name acceptable document types, submission methods, review standards, or deadlines.
For this route, treat the initial call as a clarification step. State that the question concerns accessibility needs and documents. Ask whether any document applies, what purpose it would serve, and how MVBH wants relevant information provided. This keeps the request within the documented admissions process without assuming a requirement.