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Regina Perry Siu, APRN

Psychiatric/Mental Health Nurse Practitioner in Wayland, MA · enumerated 2023 · practices at Sudbury River Therapy Pllc.

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

National Provider Identifier

1770366072

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Registry record

Entity type Individual (Type 1)
Name Regina Perry Siu
Credential APRN
Sex Female
Practice address 260 Boston Post Rd Ste 10, Wayland, MA, 01778
Phone (978) 219-4040
Fax (978) 496-8386
Enumeration date Aug 18, 2023
Last updated in NPPES Mar 12, 2025

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2347564 (MA) Primary
APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

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

What is the NPI number for Regina Siu?
The National Provider Identifier (NPI) for Regina Siu is 1770366072, a Type 1 (individual) record in the CMS NPPES registry.
Where does Regina Siu practice?
The practice location on file with NPPES is in Wayland, MA. Providers can have multiple locations; NPPES lists the primary practice address.

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