Oy Nursing Corporation

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

Legal business name

OY NURSING CORPORATION

Practice address

805 N Lincoln St
Dixon, CA 95620-2172

Phone

(530) 979-6008

Fax

(530) 237-0961

NPI assigned

Sep 22, 2026

Organization subpart

No

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Olga Yefremenkova, MSN, PMHNP-BC, FNP-B

Title

President

Phone

(530) 979-6008

Specialties & licenses 1

Addresses

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1790035200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1790035200000",
    "number": "1033021241",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "805 N LINCOLN ST",
            "city": "DIXON",
            "state": "CA",
            "postal_code": "956202172",
            "telephone_number": "530-979-6008",
            "fax_number": "530-237-0961"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "805 N LINCOLN ST",
            "city": "DIXON",
            "state": "CA",
            "postal_code": "956202172",
            "telephone_number": "530-979-6008",
            "fax_number": "530-237-0961"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "OY NURSING CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-09-22",
        "last_updated": "2026-09-22",
        "certification_date": "2026-09-22",
        "status": "A",
        "authorized_official_last_name": "YEFREMENKOVA",
        "authorized_official_first_name": "OLGA",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "530-979-6008",
        "authorized_official_credential": "MSN, PMHNP-BC, FNP-B"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Psychiatric/Mental Health Nurse Practitioner in Dixon, CA
• Providers in Dixon, CA by specialty
• Psychiatric/Mental Health Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 22, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.