Quick answers
- Which hospitals does John S. Walker work at?
- Medicare's official clinician data lists John S. Walker at 3 hospitals: Robert Wood Johnson University Hospital - Somerset…, Robert Wood Johnson University Hospital at Rahway and University Medical Center of Princeton at Plainsboro. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. Walker see patients?
- Medicare's clinician data lists 1 practice location in Somerville, NJ. Call before your visit to confirm the address.
- What is John S. Walker's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does John S. Walker accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Walker 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 S. Walker?
- (908) 685-2200, as listed in official Medicare / NPI Registry data.
- What is John S. Walker's NPI number?
- 1013974500. 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 S. Walker works
Medicare's Facility Affiliation Data lists John S. Walker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Robert Wood Johnson University Hospital - Somerset…Somerville, NJ · Acute Care Hospital · CCN 310048
- Robert Wood Johnson University Hospital at RahwayRahway, NJ · Acute Care Hospital · CCN 310024
- University Medical Center of Princeton at PlainsboroPlainsboro, NJ · Acute Care Hospital · CCN 310010
Practice locations
Addresses where John S. Walker is enrolled with Medicare (CMS data updated 2026-10-02).
- 110 Rehill AveSomerville, NJ 08876 (908) 685‑2200
Group practices
Medicare enrollment lists John S. Walker as a member of this group (CMS data updated 2026-10-02).
- RWJBH Observation Associates LLC1,008 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Somerville
Clinicians with the same Medicare primary specialty in Somerville, NJ — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013974500 |
| 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