Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Theresa O'Brien
Pharmacist in Florence, MA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1922381714
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Registry record
Entity type Individual (Type 1)
Name Theresa O'Brien
Sex Female
Practice address 70 Main St, Florence, MA, 01062
Phone (413) 586-1190
Enumeration date Sep 28, 2011
Last updated in NPPES Dec 22, 2022
Taxonomy & licenses
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 Theresa O'Brien?
The National Provider Identifier (NPI) for Theresa O'Brien is 1922381714, a Type 1 (individual) record in the CMS NPPES registry.
Where does Theresa O'Brien practice?
The practice location on file with NPPES is in Florence, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Steven Esrick Family Medicine Physician · Florence, MA NPI 1154321875 David Kaufman Family Medicine Physician · Florence, MA NPI 1083614325 George Kriebel Psychiatry Physician · Florence, MA NPI 1710987177 Henry Simkin Family Medicine Physician · Florence, MA NPI 1336149384 Paul Thaler Family Medicine Physician · Florence, MA NPI 1538169594 Julie Waight Family Nurse Practitioner · Florence, MA NPI 1871594788 Linda Preston Family Medicine Physician · Florence, MA NPI 1487636411 Bruce Finke Geriatric Medicine (Family Medicine) Physician · Florence, MA NPI 1669446597
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-22.