Quick answers
- Which hospitals does Mitchell I. Fenster work at?
- Medicare's official clinician data lists Mitchell I. Fenster at 3 hospitals: Northern Westchester Hospital, Phelps Hospital and White Plains Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mitchell I. Fenster see patients?
- Medicare's clinician data lists 2 practice locations, including Hudson, NY and Valhalla, NY. Call before your visit to confirm the address.
- What is Mitchell I. Fenster's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mitchell I. Fenster accept Medicare assignment?
- Medicare's clinician data says Mitchell I. Fenster may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- Does Mitchell I. Fenster offer telehealth?
- Medicare's clinician data says Mitchell I. Fenster offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mitchell I. Fenster?
- (800) 479-7695, as listed in official Medicare / NPI Registry data.
- What is Mitchell I. Fenster's NPI number?
- 1548378573. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mitchell I. Fenster works
Medicare's Facility Affiliation Data lists Mitchell I. Fenster at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northern Westchester HospitalMount Kisco, NY · Acute Care Hospital · CCN 330162
- Phelps HospitalSleepy Hollow, NY · Acute Care Hospital · CCN 330261
- White Plains Hospital CenterWhite Plains, NY · Acute Care Hospital · CCN 330304
Practice locations
Addresses where Mitchell I. Fenster is enrolled with Medicare (CMS data updated 2026-10-02).
- 125 Harry Howard AveHudson, NY 12534 (800) 479‑7695
- 465 Columbus Ave, Suite 125Valhalla, NY 10595 (914) 232‑3255
Group practices
Medicare enrollment lists Mitchell I. Fenster as a member of these groups (CMS data updated 2026-10-02).
- Select PT, Ot and SLP Rehabilitation Ny, PLLC301 clinicians in the group
- Westchester Health Medical PC88 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Hudson
Clinicians with the same Medicare primary specialty in Hudson, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Icahn School Of Medicine At Mount Sinai |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1548378573 |
| 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