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Middlesex Psychiatry, Pllc

Mental Health Clinic/Center (Including Community Mental Health Center) in Holliston, MA · enumerated 2018 · authorized official Jamie Simoneau, Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1194233320

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Registry record

Entity type Organization (Type 2)
Legal business name Middlesex Psychiatry, Pllc
Practice address 847 Washington St, Holliston, MA, 01746
Phone (508) 306-1319
Fax (508) 861-0156
Enumeration date Jan 22, 2018
Last updated in NPPES Jan 22, 2018

Taxonomy & classification

261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities · License RN266987 (MA) Primary
363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN266987 (MA) Secondary
364SP0808X Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License RN266987 (MA) Secondary

Authorized official

Name Jamie Simoneau
Title Manager
Phone (508) 306-1319

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where is Middlesex Psychiatry, Pllc located?
The practice location on file with NPPES is in Holliston, MA.
How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2018-01-22. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-22.