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Oy Nursing Corporation

Psychiatric/Mental Health Nurse Practitioner in Dixon, CA · enumerated 2026 · authorized official Olga Yefremenkova, President.

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

National Provider Identifier

1033021241

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Registry record

Entity type Organization (Type 2)
Legal business name Oy Nursing Corporation
Practice address 805 N Lincoln St, Dixon, CA, 95620
Phone (530) 979-6008
Fax (530) 237-0961
Enumeration date Sep 22, 2026
Last updated in NPPES Sep 22, 2026

Taxonomy & classification

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers Primary

Authorized official

Name Olga Yefremenkova
Title President
Phone (530) 979-6008

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.

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Frequently asked questions

What type of organization is Oy Nursing Corporation?
Oy Nursing Corporation is registered in NPPES as a Psychiatric/Mental Health Nurse Practitioner (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-09-22.