Start with the verified admissions route
Use MVBH admissions for the admissions route, then contact MVBH to clarify requirements. MVBH states that people can call 978-233-9597 for a confidential conversation about starting treatment in Amesbury, Massachusetts.
The verified starting point is limited. MVBH identifies a confidential admissions conversation by phone, but the supplied source does not enumerate documents, data fields, forms, or records for referral review. Nothing in the evidence supports treating an assumed intake checklist as an official requirement.
For this route, separate two questions. The first is what information MVBH requires for review. The second is how that information may be provided. Neither answer is specified in the supplied facts. Asking both questions avoids assuming that a general admissions contact establishes a submission method.