Quick answers
- Which hospitals does William J. Berger work at?
- Medicare's official clinician data lists William J. Berger at 3 hospitals: Long Island Jewish Medical Center, North Shore University Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William J. Berger see patients?
- Medicare's clinician data lists 1 practice location in Manhasset, NY. Call before your visit to confirm the address.
- What is William J. Berger's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does William J. Berger accept Medicare assignment?
- Yes. Medicare's clinician data says William J. Berger 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 William J. Berger?
- (516) 488-4428, as listed in official Medicare / NPI Registry data.
- What is William J. Berger's NPI number?
- 1003892969. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William J. Berger works
Medicare's Facility Affiliation Data lists William J. Berger at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · CCN 330195
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where William J. Berger is enrolled with Medicare (CMS data updated 2026-10-02).
- 1201 Northern Blvd, Suite 201Manhasset, NY 11030 (516) 488‑4428
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in Manhasset
Clinicians with the same Medicare primary specialty in Manhasset, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1979 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003892969 |
| 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