Quick answers
- Which hospitals does William Greenhut work at?
- Medicare's official clinician data lists William Greenhut at 1 hospital: Nyack Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Greenhut see patients?
- Medicare's clinician data lists 5 practice locations, including Port Jervis, NY, Nyack, NY and Mendham, NJ. Call before your visit to confirm the address.
- What is William Greenhut's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does William Greenhut accept Medicare assignment?
- Yes. Medicare's clinician data says William Greenhut 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.
- Does William Greenhut offer telehealth?
- Medicare's clinician data says William Greenhut offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William Greenhut?
- (973) 464-8363, as listed in official Medicare / NPI Registry data.
- What is William Greenhut's NPI number?
- 1205098563. 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 Greenhut works
Medicare's Facility Affiliation Data lists William Greenhut at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Nyack HospitalNyack, NY · Acute Care Hospital · CCN 330104
Practice locations
Addresses where William Greenhut is enrolled with Medicare (CMS data updated 2026-10-02).
- 123 Pike St, Suite 3Port Jervis, NY 12771 (973) 464‑8363
- 160 N Midland AveNyack, NY 10960 (954) 939‑5000
- 4 Hampshire DrMendham, NJ 07945 (973) 464‑8363
- 5235 N Front StHarrisburg, PA 17110 (973) 566‑1826
- 80 State StAlbany, NY 12207 (973) 566‑1826
Group practices
Medicare enrollment lists William Greenhut as a member of these groups (CMS data updated 2026-10-02).
- Nyack Emergency Medical Association PLLC61 clinicians in the group
- Dimerhealth Medical Practice30 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Port Jervis
Clinicians with the same Medicare primary specialty in Port Jervis, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1205098563 |
| 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