Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Katherine Mary O'Neill, RN

Registered Nurse in Yreka, CA · enumerated 2007 · practices at County of Siskiyou.

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

National Provider Identifier

1265648877

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Katherine Mary O'Neill

Credential RN

Sex Female

Practice address Yreka, CA, 96097

Phone (530) 841-4745

Fax (530) 841-4781

Enumeration date May 14, 2007

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 276485 (CA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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 1265648877 active?

Yes, as of the latest NPPES snapshot, NPI 1265648877 is active (record last updated 2007-07-08).

How do I verify Katherine O'Neill's NPI record?

Cross-check NPI 1265648877 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 →

Sarah Collard Clinical Psychologist · Yreka, CA NPI 1720025232 Deborah Dickens Addiction (Substance Use Disorder) Counselor · Yreka, CA NPI 1194820787 William Lofthouse Psychiatry Physician · Yreka, CA NPI 1821197567 Thomas Mcaleer Marriage & Family Therapist · Yreka, CA NPI 1821175464 Robert Levert Rehabilitation Counselor · Yreka, CA NPI 1104986850 Darcy Walker Addiction (Substance Use Disorder) Counselor · Yreka, CA NPI 1407992183 Leslie Zane Marriage & Family Therapist · Yreka, CA NPI 1851416309 Bruce Crawford Marriage & Family Therapist · Yreka, CA NPI 1043330244

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.