Quick answers
- Which hospitals does Brian S. Geller work at?
- Medicare's official clinician data lists Brian S. Geller at 3 hospitals: John T Mather Memorial Hospital of Port Jefferson, St Catherine of Siena Hospital and St Charles Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian S. Geller see patients?
- Medicare's clinician data lists 4 practice locations, including West Islip, NY, Port Jefferson, NY and Smithtown, NY. Call before your visit to confirm the address.
- What is Brian S. Geller's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Brian S. Geller accept Medicare assignment?
- Yes. Medicare's clinician data says Brian S. Geller 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 Brian S. Geller?
- (631) 465-6225, as listed in official Medicare / NPI Registry data.
- What is Brian S. Geller's NPI number?
- 1558375329. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brian S. Geller works
Medicare's Facility Affiliation Data lists Brian S. Geller at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
Practice locations
Addresses where Brian S. Geller is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (631) 465‑6225
- 200 Belle Terre RdPort Jefferson, NY 11777 (631) 465‑6225
- 496 Smithtown Byp, Suite 101Smithtown, NY 11787 (631) 979‑8880
- 5225 Rte, 347 Suite 23Port Jefferson Station, NY 11776 (631) 473‑8880
Group practices
Medicare enrollment lists Brian S. Geller as a member of these groups (CMS data updated 2026-10-02).
- Cardiac Ekg Interpretation, P. C.57 clinicians in the group
- Millennium Medical Professionals, PLLC5 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Howard University College Of Medicine |
| Graduation year | 1980 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558375329 |
| 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