Quick answers
- Which hospitals does John P. Baron work at?
- Medicare's official clinician data lists John P. Baron at 5 hospitals: Adventist Health St Helena, Providence Queen of the Valley Medical Center, Sonoma Valley Hospital, Sutter Medical Center, Sacramento and Sutter Solano Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John P. Baron see patients?
- Medicare's clinician data lists 2 practice locations, including Vallejo, CA and Berkeley, CA. Call before your visit to confirm the address.
- What is John P. Baron's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does John P. Baron accept Medicare assignment?
- Yes. Medicare's clinician data says John P. Baron 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 John P. Baron offer telehealth?
- Medicare's clinician data says John P. Baron offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John P. Baron?
- (707) 642-7510, as listed in official Medicare / NPI Registry data.
- What is John P. Baron's NPI number?
- 1861471591. 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 P. Baron works
Medicare's Facility Affiliation Data lists John P. Baron at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health St HelenaSaint Helena, CA · Acute Care Hospital · CCN 050013
- Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · CCN 050009
- Sonoma Valley HospitalSonoma, CA · Acute Care Hospital · CCN 050090
- Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · CCN 050108
- Sutter Solano Medical CenterVallejo, CA · Acute Care Hospital · CCN 050101
Practice locations
Addresses where John P. Baron is enrolled with Medicare (CMS data updated 2026-10-02).
- 127 Hospital Dr, Suite 204Vallejo, CA 94589 (707) 642‑7510
- 2905 Telegraph AveBerkeley, CA 94705 (510) 841‑0411
Group practices
Medicare enrollment lists John P. Baron as a member of this group (CMS data updated 2026-10-02).
- East Bay Nephrology Medical Group Inc31 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Vallejo
Clinicians with the same Medicare primary specialty in Vallejo, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Chicago College Of Osteopathy |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1861471591 |
| 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