Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Maryellen Dyer-Russell, DNP, PMHNP-BC

Psychiatric/Mental Health Nurse Practitioner in Oxnard, CA · enumerated 2007.

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

National Provider Identifier

1174652002

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Registry record

Entity type Individual (Type 1)

Name Dr. Maryellen Dyer-Russell

Credential DNP, PMHNP-BC

Sex Female

Practice address 1911 Williams Dr, Oxnard, CA, 93036

Phone (805) 981-6830

Fax (805) 289-3395

Enumeration date Mar 5, 2007

Last updated in NPPES Jul 2, 2021

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License B333567-9664 (CA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 9664 (CA) Primary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP 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

What specialty is Maryellen Dyer-Russell?

Maryellen Dyer-Russell is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Meredyth Alpert Clinical Social Worker · Oxnard, CA NPI 1154401024 Amy Maiman Clinical Social Worker · Oxnard, CA NPI 1679659494 Lillian Dibianca Mental Health Counselor · Oxnard, CA NPI 1255489837 Randolph Brown Marriage & Family Therapist · Oxnard, CA NPI 1689711277 Pacific Clinics Community/Behavioral Health Agency · Oxnard, CA NPI 1306972682 Levana Adato Clinical Social Worker · Oxnard, CA NPI 1184750481 Celia Lopez Marriage & Family Therapist · Oxnard, CA NPI 1245369081 Ophra Ashur Clinical Social Worker · Oxnard, CA NPI 1275663437

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-02.