Quick answers
- Which hospitals does Allister R. Williams work at?
- Medicare's official clinician data lists Allister R. Williams at 5 hospitals: Bon Secours Community Hospital, Lehigh Valley Hospital, Lehigh Valley Hospital - Pocono, St Luke's Hospital - Monroe Campus and St Luke's Miners Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Allister R. Williams see patients?
- Medicare's clinician data lists 2 practice locations, including Port Jervis, NY and East Stroudsburg, PA. Call before your visit to confirm the address.
- What is Allister R. Williams's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Allister R. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Allister R. Williams 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 Allister R. Williams?
- (570) 421-7020, as listed in official Medicare / NPI Registry data.
- What is Allister R. Williams's NPI number?
- 1639258205. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Allister R. Williams works
Medicare's Facility Affiliation Data lists Allister R. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bon Secours Community HospitalPort Jervis, NY · Acute Care Hospital · CCN 330135
- Lehigh Valley HospitalAllentown, PA · Acute Care Hospital · CCN 390133
- Lehigh Valley Hospital - PoconoEast Stroudsburg, PA · Acute Care Hospital · CCN 390201
- St Luke's Hospital - Monroe CampusStroudsburg, PA · Acute Care Hospital · CCN 390330
- St Luke's Miners Memorial HospitalCoaldale, PA · Acute Care Hospital · CCN 390183
Practice locations
Addresses where Allister R. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 160 E Main StPort Jervis, NY 12771
- 600 Plaza Ct, Suite CEast Stroudsburg, PA 18301 (570) 421‑7020
Group practices
Medicare enrollment lists Allister R. Williams as a member of this group (CMS data updated 2026-10-02).
- Mountain Valley Orthopedics PC20 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | College Of Medicine And Surgery |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639258205 |
| 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