Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine M O'Brien, FNP

Family Nurse Practitioner in Watertown, NY · enumerated 2006 · practices at Rachel E. Lewis M.D..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1154330751

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Registry record

Entity type Individual (Type 1)

Name Catherine M O'Brien

Credential FNP

Sex Female

Practice address 26495 State Route 3, Watertown, NY, 13601

Phone (315) 786-1924

Fax (315) 786-0823

Enumeration date Aug 5, 2006

Last updated in NPPES May 21, 2008

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F332600-1 (NY) Primary

FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

Other identifiers

Identifier	Type	State	Issuer
02011310	Medicaid	NY	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1154330751 active?

Yes, as of the latest NPPES snapshot, NPI 1154330751 is active (record last updated 2008-05-21).

How do I verify Catherine O'Brien's NPI record?

Cross-check NPI 1154330751 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 →

Joan Hawthorne Family Nurse Practitioner · Watertown, NY NPI 1770592362 Rachel E. Lewis M.D. Dermatology Physician · Watertown, NY NPI 1376740043 Manuel Orellana Flores Physical Therapist · Watertown, NY NPI 1043029978 Rebecca Williams Physical Therapist · Watertown, NY NPI 1477362036 Vinoth Kaliappan Physical Therapist · Watertown, NY NPI 1922973924

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-21.