Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Olivia Duffy
Physical Therapist in Middleton, MA · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1144164237
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Registry record
Entity type Individual (Type 1)
Name Olivia Duffy
Sex Female
Practice address 35 Village Rd Ste 100, Middleton, MA, 01949
Phone (857) 557-5010
Fax (857) 557-5040
Enumeration date Apr 17, 2026
Last updated in NPPES Apr 17, 2026
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PTL25799 (MA) Primary
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
Where does Olivia Duffy practice?
The practice location on file with NPPES is in Middleton, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Olivia Duffy?
The National Provider Identifier (NPI) for Olivia Duffy is 1144164237, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Samantha Spagnuolo Professional Counselor · Middleton, MA NPI 1619394749 Alla Palma Clinical Psychologist · Middleton, MA NPI 1023400397 Jennifer Burns Counselor · Middleton, MA NPI 1609312404 Samantha Spagnuolo, Lmhc, LLC Community/Behavioral Health Agency · Middleton, MA NPI 1669080362 Spring Valley Behavioral Consultants LLC Behavior Analyst · Middleton, MA NPI 1235701681 Mackenzie Targett Psychiatric/Mental Health Nurse Practitioner · Middleton, MA NPI 1972220598 Katelyn Anderson Licsw Clinical Social Worker · Middleton, MA NPI 1285333633 Paula Ngarega Behavior Analyst · Middleton, MA NPI 1043997752
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-17.