Quick answers
- Which hospitals does Brian A. Jonas work at?
- Medicare's official clinician data lists Brian A. Jonas at 5 hospitals: Adventist Health and Rideout, Adventist Health Sonora, Enloe Health, Marshall Medical Center and University of California Davis Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian A. Jonas see patients?
- Medicare's clinician data lists 1 practice location in Merced, CA. Call before your visit to confirm the address.
- What is Brian A. Jonas's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Brian A. Jonas accept Medicare assignment?
- Yes. Medicare's clinician data says Brian A. Jonas 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 Brian A. Jonas offer telehealth?
- Medicare's clinician data says Brian A. Jonas offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Brian A. Jonas?
- (209) 384-6528, as listed in official Medicare / NPI Registry data.
- What is Brian A. Jonas's NPI number?
- 1558542209. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brian A. Jonas works
Medicare's Facility Affiliation Data lists Brian A. Jonas at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health and RideoutMarysville, CA · Acute Care Hospital · CCN 050133
- Adventist Health SonoraSonora, CA · Acute Care Hospital · CCN 050335
- Enloe HealthChico, CA · Acute Care Hospital · CCN 050039
- Marshall Medical CenterPlacerville, CA · Acute Care Hospital · CCN 050254
- University of California Davis Medical CenterSacramento, CA · Acute Care Hospital · CCN 050599
Practice locations
Addresses where Brian A. Jonas is enrolled with Medicare (CMS data updated 2026-10-02).
- 3850 G StMerced, CA 95340 (209) 384‑6528
Group practices
Medicare enrollment lists Brian A. Jonas as a member of this group (CMS data updated 2026-10-02).
- Regents of the Univ of Ca1,584 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Merced
Clinicians with the same Medicare primary specialty in Merced, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Davis School Of Medicine |
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1558542209 |
| 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