Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Kathleen Irene O'Brien, P.A.-C
Physician Assistant in Topsham, ME · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1942597661
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Registry record
Entity type Individual (Type 1)
Name Kathleen Irene O'Brien
Credential P.A.-C
Sex Female
Practice address 1 Wellness Way, Topsham, ME, 04086
Phone (207) 406-7600
Fax (207) 618-5683
Enumeration date Jul 1, 2011
Last updated in NPPES Aug 24, 2023
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA1272 (ME) 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
Is NPI 1942597661 active?
Yes, as of the latest NPPES snapshot, NPI 1942597661 is active (record last updated 2023-08-24).
How do I verify Kathleen O'Brien's NPI record?
Cross-check NPI 1942597661 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → David Inger Family Medicine Physician · Topsham, ME NPI 1215941372 Susan Lohnes Adult Health Nurse Practitioner · Topsham, ME NPI 1770599425 John Parker Internal Medicine Physician · Topsham, ME NPI 1821005109 Jennifer Riehl Internal Medicine Physician · Topsham, ME NPI 1700897618 Mary Lake Family Nurse Practitioner · Topsham, ME NPI 1578671871 Christopher Meserve Adult Medicine Physician · Topsham, ME NPI 1184713471 Patricia Davis Clinical Social Worker · Topsham, ME NPI 1366504516 Deirdre Heersink Family Medicine Physician · Topsham, ME NPI 1417157298
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-24.