Quick answers
- Which hospitals does John Williams work at?
- Medicare's official clinician data lists John Williams at 5 hospitals: Northwest Medical Center-Springdale, Peconic Bay Medical Center, Sacred Heart Hospital on the Emerald Coast, St Anthony Community Hospital and Wynn Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Williams see patients?
- Medicare's clinician data lists 5 practice locations, including Riverhead, NY, Utica, NY and Fayetteville, AR. Call before your visit to confirm the address.
- What is John Williams's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John Williams accept Medicare assignment?
- Yes. Medicare's clinician data says John 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 John Williams?
- (631) 548-6101, as listed in official Medicare / NPI Registry data.
- What is John Williams's NPI number?
- 1023637964. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Williams works
Medicare's Facility Affiliation Data lists John Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwest Medical Center-SpringdaleSpringdale, AR · Acute Care Hospital · CCN 040022
- Peconic Bay Medical CenterRiverhead, NY · Acute Care Hospital · CCN 330107
- Sacred Heart Hospital on the Emerald CoastMiramar Beach, FL · Acute Care Hospital · CCN 100292
- St Anthony Community HospitalWarwick, NY · Acute Care Hospital · CCN 330205
- Wynn HospitalUtica, NY · Acute Care Hospital · CCN 330044
Practice locations
Addresses where John Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Heroes WayRiverhead, NY 11901 (631) 548‑6101
- 111 Hospital DrUtica, NY 13502 (315) 917‑9966
- 1255 S Shiloh DrFayetteville, AR 72701 (479) 757‑1760
- 15 Maple AveWarwick, NY 10990 (845) 986‑2276
- 7800 US Hwy 98 WMiramar Beach, FL 32550 (850) 278‑3000
Group practices
Medicare enrollment lists John Williams as a member of these groups (CMS data updated 2026-10-02).
- Galen Inpatient Physicians PC1,077 clinicians in the group
- New York Medical Physician Associates PC202 clinicians in the group
- Central Suffolk Hospital95 clinicians in the group
- Springdale Bentonville HBP Services LLC84 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Riverhead
Clinicians with the same Medicare primary specialty in Riverhead, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023637964 |
| 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