Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Mary Louise Sawyer, R.N.
Registered Nurse in Marlborough, MA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871261750
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Registry record
Entity type Individual (Type 1)
Name Ms. Mary Louise Sawyer
Credential R.N.
Sex Female
Practice address 340 Maple St Ste 410, Marlborough, MA, 01752
Phone (508) 624-0304
Enumeration date Sep 3, 2021
Last updated in NPPES Sep 3, 2021
Taxonomy & licenses
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam.
About the RN credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00000000 | Other | - | N/A |
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 Mary Sawyer?
The National Provider Identifier (NPI) for Mary Sawyer is 1871261750, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Sawyer practice?
The practice location on file with NPPES is in Marlborough, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Lesley Segal Pediatric Occupational Therapist · Marlborough, MA NPI 1740604248 Lindsey Pousland Developmental Therapist · Marlborough, MA NPI 1568874337 Maria Abdalah Developmental Therapist · Marlborough, MA NPI 1689052706 Breana Shaw Occupational Therapist · Marlborough, MA NPI 1649798562 Megan Anderson Developmental Therapist · Marlborough, MA NPI 1982113080 Mary Kerrigan Music Therapist · Marlborough, MA NPI 1881104305 Cady Tetreault Occupational Therapy Assistant · Marlborough, MA NPI 1659867869 Edilaine Wulfila Cordeiro Bartolini Developmental Therapist · Marlborough, MA NPI 1578031696
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-03.