Quick answers
- Which hospitals does William Assante work at?
- Medicare's official clinician data lists William Assante at 2 hospitals: Montefiore St Luke's Cornwall and Westchester Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Assante see patients?
- Medicare's clinician data lists 8 practice locations, including Poughkeepsie, NY, Valhalla, NY and Hawthorne, NY. Call before your visit to confirm the address.
- What is William Assante's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Nephrology.
- Does William Assante accept Medicare assignment?
- Yes. Medicare's clinician data says William Assante 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 Assante?
- (845) 483-5997, as listed in official Medicare / NPI Registry data.
- What is William Assante's NPI number?
- 1366903304. 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 Assante works
Medicare's Facility Affiliation Data lists William Assante at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Montefiore St Luke's CornwallNewburgh, NY · Acute Care Hospital · CCN 330264
- Westchester Medical CenterValhalla, NY · Acute Care Hospital · CCN 330234
Practice locations
Addresses where William Assante is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 1 Webster AvePoughkeepsie, NY 12601
- 100 Woods RdValhalla, NY 10595
- 19 Baker Ave, Suite 101Poughkeepsie, NY 12601 (845) 483‑5997
- 19 Bradhurst AveHawthorne, NY 10532
- 19 Laurel AveCornwall, NY 12518 (845) 561‑4400
Group practices
Medicare enrollment lists William Assante as a member of this group (CMS data updated 2026-10-02).
- Westchester Medical Center Advanced Physician Services PC897 clinicians in the group
Specialties
- Internal Medicineprimary
- Nephrologyalso
Other internal medicine doctors in Poughkeepsie
Clinicians with the same Medicare primary specialty in Poughkeepsie, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366903304 |
| 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