Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sarah L Sirois, RN
Registered Nurse in Waltham, MA · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770321234
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Registry record
Entity type Individual (Type 1)
Name Sarah L Sirois
Credential RN
Sex Female
Practice address 431 River St Ste 3, Waltham, MA, 02453
Phone (781) 891-0555
Enumeration date Jul 18, 2024
Last updated in NPPES Jul 18, 2024
Taxonomy & licenses
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam.
About the RN 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.
Frequently asked questions
What is the NPI number for Sarah Sirois?
The National Provider Identifier (NPI) for Sarah Sirois is 1770321234, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sarah Sirois practice?
The practice location on file with NPPES is in Waltham, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-18.