Quick answers
- Which hospitals does William D. Ryan work at?
- Medicare's official clinician data lists William D. Ryan at 2 hospitals: California Pacific Medical Center- Van Ness Campus and Wynn Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William D. Ryan see patients?
- Medicare's clinician data lists 1 practice location in Whitesboro, NY. Call before your visit to confirm the address.
- What is William D. Ryan's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does William D. Ryan accept Medicare assignment?
- Yes. Medicare's clinician data says William D. Ryan 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 D. Ryan?
- (315) 736-9337, as listed in official Medicare / NPI Registry data.
- What is William D. Ryan's NPI number?
- 1104924570. 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 D. Ryan works
Medicare's Facility Affiliation Data lists William D. Ryan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · CCN 050047
- Wynn HospitalUtica, NY · Acute Care Hospital · CCN 330044
Practice locations
Addresses where William D. Ryan is enrolled with Medicare (CMS data updated 2026-10-02).
- 37 Main StWhitesboro, NY 13492 (315) 736‑9337
Group practices
Medicare enrollment lists William D. Ryan as a member of this group (CMS data updated 2026-10-02).
- MVHS Inc334 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of Ny Upstate Medical University |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104924570 |
| 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