Quick answers
- Where does Peter Obrien see patients?
- Medicare's clinician data lists 2 practice locations, including Hudson, MA and Sudbury, MA. Call before your visit to confirm the address.
- What is Peter Obrien's specialty?
- Medicare lists Mental Health Counselor as the primary specialty.
- Does Peter Obrien accept Medicare assignment?
- Medicare's clinician data says Peter Obrien may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Peter Obrien's NPI number?
- 1366165755. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Peter Obrien is enrolled with Medicare (CMS data updated 2026-10-02).
- 43 Broad St, Suite B206Hudson, MA 01749
- 435 Cold Brook Dr, Apt 409Sudbury, MA 01776
Specialties
- Mental Health Counselorprimary
Find other clinicians: Mental Health Counselor, Massachusetts →
Other mental health counselors in Hudson
Clinicians with the same Medicare primary specialty in Hudson, MA — not a recommendation.
Clinician information
| Graduation year | 2022 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1366165755 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians