Start with the verified admissions route
MVBH admissions explains the starting point, while contact MVBH provides the related contact route. For this timing question, the verified action is calling 978-233-9597 for a confidential conversation about starting treatment.
The admissions evidence provides one direct starting route: call 978-233-9597 for a confidential conversation about starting treatment at Merrimack Valley Behavioral Health in Amesbury, Massachusetts. It does not define when coordination with a current provider begins, how long it takes, or when it ends.
The verified program scope is PHP, IOP, OP, Virtual IOP, and Dual Diagnosis. These names define the supported outpatient scope for this page. They do not supply program-specific coordination timing. A useful admissions question is therefore narrow: ask what timing information can be confirmed for current provider coordination within the program being discussed.