Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sudbury River Therapy Pllc

Psychiatric/Mental Health Nurse Practitioner in Wayland, MA · enumerated 2024 · authorized official Regina Siu, Psychiatric Nurse Practitioner.

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

National Provider Identifier

1043044944

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Registry record

Entity type Organization (Type 2)

Legal business name Sudbury River Therapy Pllc

Practice address 260 Boston Post Rd Ste 10, Wayland, MA, 01778

Phone (978) 219-4040

Fax (978) 496-8386

Enumeration date Sep 2, 2024

Last updated in NPPES Mar 12, 2025

Taxonomy & classification

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers Primary

Authorized official

Name Regina Siu

Title Psychiatric Nurse Practitioner

Phone (978) 219-4040

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 Sudbury River Therapy Pllc located?

The practice location on file with NPPES is in Wayland, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-03-12. Verify at npiregistry.cms.hhs.gov.

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Regina Siu Psychiatric/Mental Health Nurse Practitioner · Wayland, MA NPI 1770366072

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-12.