Quick answers
- Which hospitals does Benjamin Felder work at?
- Medicare's official clinician data lists Benjamin Felder at 2 hospitals: Brooklyn Hospital Center - Downtown Campus and Mount Sinai South Nassau. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Benjamin Felder see patients?
- Medicare's clinician data lists 4 practice locations, including Oceanside, NY, New York, NY and Brooklyn, NY. Call before your visit to confirm the address.
- What is Benjamin Felder's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Benjamin Felder accept Medicare assignment?
- Yes. Medicare's clinician data says Benjamin Felder 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 Benjamin Felder?
- (877) 768-8462, as listed in official Medicare / NPI Registry data.
- What is Benjamin Felder's NPI number?
- 1003261041. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Benjamin Felder works
Medicare's Facility Affiliation Data lists Benjamin Felder at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Brooklyn Hospital Center - Downtown CampusBrooklyn, NY · Acute Care Hospital · CCN 330056
- Mount Sinai South NassauOceanside, NY · Acute Care Hospital · CCN 330198
Practice locations
Addresses where Benjamin Felder is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Healthy WayOceanside, NY 11572 (877) 768‑8462
- 1 St Ave 16th StNew York, NY 10003 (212) 844‑8100
- 121 Dekalb AveBrooklyn, NY 11201 (718) 250‑8000
- 281 1st AveNew York, NY 10003 (212) 844‑8100
Group practices
Medicare enrollment lists Benjamin Felder as a member of these groups (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
- Mount Sinai School of Medicine148 clinicians in the group
- Atlantic Professional Services of Rhode Island Incorporated16 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Oceanside
Clinicians with the same Medicare primary specialty in Oceanside, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003261041 |
| 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