Quick answers
- Which hospitals does Isaac Eisenstein work at?
- Medicare's official clinician data lists Isaac Eisenstein at 2 hospitals: UCI Health-Lakewood and UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Isaac Eisenstein see patients?
- Medicare's clinician data lists 2 practice locations, including Lakewood, CA. Call before your visit to confirm the address.
- What is Isaac Eisenstein's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Isaac Eisenstein accept Medicare assignment?
- Yes. Medicare's clinician data says Isaac Eisenstein 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 the phone number for Isaac Eisenstein?
- (562) 630-0910, as listed in official Medicare / NPI Registry data.
- What is Isaac Eisenstein's NPI number?
- 1780649830. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Isaac Eisenstein works
Medicare's Facility Affiliation Data lists Isaac Eisenstein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UCI Health-LakewoodLakewood, CA · Acute Care Hospital · CCN 050581
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where Isaac Eisenstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 3650 E S St, Suite 210Lakewood, CA 90712 (562) 630‑0910
- 3650 E S St, Suite 310Lakewood, CA 90712 (562) 531‑1980
Group practices
Medicare enrollment lists Isaac Eisenstein as a member of this group (CMS data updated 2026-10-02).
- Prohealth Partners, a Medical Group239 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1968 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780649830 |
| 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