Quick answers
- Which hospitals does James D. Mosson work at?
- Medicare's official clinician data lists James D. Mosson at 4 hospitals: Adventist Health Sonora, Mark Twain Medical Center, St Joseph's Medical Center of Stockton and Sutter Amador Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James D. Mosson see patients?
- Medicare's clinician data lists 1 practice location in Valley Springs, CA. Call before your visit to confirm the address.
- What is James D. Mosson's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does James D. Mosson accept Medicare assignment?
- Yes. Medicare's clinician data says James D. Mosson 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 James D. Mosson?
- (209) 772-7070, as listed in official Medicare / NPI Registry data.
- What is James D. Mosson's NPI number?
- 1437135670. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James D. Mosson works
Medicare's Facility Affiliation Data lists James D. Mosson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · CCN 050335
- Mark Twain Medical CenterSan Andreas, CA · Critical Access Hospital · CCN 051332
- St Joseph's Medical Center of StocktonStockton, CA · Acute Care Hospital · CCN 050084
- Sutter Amador HospitalJackson, CA · Acute Care Hospital · CCN 050014
Practice locations
Addresses where James D. Mosson is enrolled with Medicare (CMS data updated 2026-10-02).
- 51 Wellness WayValley Springs, CA 95252 (209) 772‑7070
Group practices
Medicare enrollment lists James D. Mosson as a member of this group (CMS data updated 2026-10-02).
- Mark Twain Health Care District17 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Davis School Of Medicine |
| Graduation year | 1972 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437135670 |
| 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