Quick answers
- Which hospitals does Jeff Borenstein work at?
- Medicare's official clinician data lists Jeff Borenstein at 3 hospitals: Ronald Reagan UCLA Medical Center, Santa Monica - UCLA Med Ctr & Orthopaedic Hospital and UCLA West Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jeff Borenstein see patients?
- Medicare's clinician data lists 1 practice location in Porter Ranch, CA. Call before your visit to confirm the address.
- What is Jeff Borenstein's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Jeff Borenstein accept Medicare assignment?
- Yes. Medicare's clinician data says Jeff Borenstein 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 Jeff Borenstein offer telehealth?
- Medicare's clinician data says Jeff Borenstein offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jeff Borenstein?
- (818) 271-2400, as listed in official Medicare / NPI Registry data.
- What is Jeff Borenstein's NPI number?
- 1326260522. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jeff Borenstein works
Medicare's Facility Affiliation Data lists Jeff Borenstein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050262
- Santa Monica - UCLA Med Ctr & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · CCN 050112
- UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · CCN 050481
Practice locations
Addresses where Jeff Borenstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 19950 Rinaldi St, Suite 300Porter Ranch, CA 91326 (818) 271‑2400
Group practices
Medicare enrollment lists Jeff Borenstein 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
Other internal medicine doctors in Porter Ranch
Clinicians with the same Medicare primary specialty in Porter Ranch, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326260522 |
| 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