Quick answers
- Which hospitals does Ronald E. De La Pena work at?
- Medicare's official clinician data lists Ronald E. De La Pena at 2 hospitals: Adventist Health Simi Valley and Los Robles Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald E. De La Pena see patients?
- Medicare's clinician data lists 1 practice location in Thousand Oaks, CA. Call before your visit to confirm the address.
- What is Ronald E. De La Pena's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Ronald E. De La Pena accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald E. De La Pena accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is Ronald E. De La Pena's NPI number?
- 1194779710. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ronald E. De La Pena works
Medicare's Facility Affiliation Data lists Ronald E. De La Pena at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · CCN 050236
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
Practice locations
Addresses where Ronald E. De La Pena is enrolled with Medicare (CMS data updated 2026-10-02).
- 2230 Lynn Rd, Suite 200Thousand Oaks, CA 91360
Group practices
Medicare enrollment lists Ronald E. De La Pena as a member of this group (CMS data updated 2026-10-02).
- Arroyo Oaks Medical Associates Inc11 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Texas Tech University Health Science Center School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194779710 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians