Ronald De la Pena, M.D.

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

A54034 Issued in CA

Practice address

2230 Lynn Rd
Suite 200
Thousand Oaks, CA 91360-1901

Phone

(805) 495-1066

Fax

(805) 497-1428

NPI assigned

May 19, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Obstetrics/Gynecology

Education

Texas Tech University Health Science Center School of Medicine, 1995

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Arroyo Oaks Medical Associates IncGroup PAC ID 7416922141, 11 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Adventist Health Simi Valley Hospital, Simi Valley, CA, CCN 050236

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Arroyo Oaks Medical Associates Inc

  • Internal Medicine Physician
  • Thousand Oaks, CA
  • NPI 1770536468
  Medicare reassignment Care Compare group
• Obhg California, P.C.

  • Obstetrics & Gynecology Physician
  • Greenville, SC
  • NPI 1215258892

  CA

  Medicare reassignment NPD
• Los Robles Regional Medical Center

  • General Acute Care Hospital
  • Thousand Oaks, CA
  • NPI 1033163019
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Simi Valley Hospital and Health Care Services

  • General Acute Care Hospital
  • Simi Valley, CA
  • NPI 1063495190
  Care Compare affiliation

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

{
    "created_epoch": "1147996800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1194779710",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2230 LYNN RD",
            "address_2": "SUITE 200",
            "city": "THOUSAND OAKS",
            "state": "CA",
            "postal_code": "913601901",
            "telephone_number": "805-495-1066",
            "fax_number": "805-497-1428"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2230 LYNN RD",
            "address_2": "SUITE 200",
            "city": "THOUSAND OAKS",
            "state": "CA",
            "postal_code": "913601901",
            "telephone_number": "805-495-1066",
            "fax_number": "805-497-1428"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DE LA PENA",
        "first_name": "RONALD",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-19",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "CA",
            "license": "A54034",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A540340",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Jean Marie Day, AMFT
• Jeanette Marie Day, LMFT
• DCL Anesthesia Inc
• DCL Anesthesia Nursing Corporation
• Lisa De Fazio, R.D.
• Ravel De Leon
• Sarah Alethea De Los Santos, PSY.D.
• Miriam H De Lyon, M.D.
• Jonathan Dean
• Amanda Debacker

• Obstetrics & Gynecology Physician in Thousand Oaks, CA
• Providers in Thousand Oaks, CA by specialty
• Obstetrics & Gynecology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.