Quick answers
- Which hospitals does Steven McCarthy work at?
- Medicare's official clinician data lists Steven McCarthy at 3 hospitals: Los Robles Hospital & Medical Center, Ronald Reagan UCLA Medical Center and UCLA West Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Steven McCarthy see patients?
- Medicare's clinician data lists 4 practice locations, including Thousand Oaks, CA, Westlake Village, CA and Santa Monica, CA. Call before your visit to confirm the address.
- What is Steven McCarthy's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Steven McCarthy accept Medicare assignment?
- Yes. Medicare's clinician data says Steven McCarthy 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.
- Does Steven McCarthy offer telehealth?
- Medicare's clinician data says Steven McCarthy offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Steven McCarthy?
- (805) 418-3500, as listed in official Medicare / NPI Registry data.
- What is Steven McCarthy's NPI number?
- 1497765309. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Steven McCarthy works
Medicare's Facility Affiliation Data lists Steven McCarthy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050262
- UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · CCN 050481
Practice locations
Addresses where Steven McCarthy is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Moody Ct, Suite 200Thousand Oaks, CA 91360 (805) 418‑3500
- 1250 La Venta Dr, Suite 207Westlake Village, CA 91361 (805) 494‑6920
- 2020 Santa Monica Blvd, Suite 210Santa Monica, CA 90404 (310) 458‑2381
- 248 Hampshire Rd, Suite 100Thousand Oaks, CA 91361 (805) 370‑0040
Group practices
Medicare enrollment lists Steven McCarthy as a member of this group (CMS data updated 2026-10-02).
- The Regents of the University of California1,462 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1497765309 |
| 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