Quick answers
- Which hospitals does Ronald G. Jan work at?
- Medicare's official clinician data lists Ronald G. Jan at 1 hospital: Mercy General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald G. Jan see patients?
- Medicare's clinician data lists 2 practice locations, including Sacramento, CA. Call before your visit to confirm the address.
- What is Ronald G. Jan's specialty?
- Medicare lists Vascular Surgery as the primary specialty, and also Internal Medicine.
- Does Ronald G. Jan accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald G. Jan 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 Ronald G. Jan?
- (916) 453-4545, as listed in official Medicare / NPI Registry data.
- What is Ronald G. Jan's NPI number?
- 1114018199. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ronald G. Jan works
Medicare's Facility Affiliation Data lists Ronald G. Jan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy General HospitalSacramento, CA · Acute Care Hospital · CCN 050017
Practice locations
Addresses where Ronald G. Jan is enrolled with Medicare (CMS data updated 2026-10-02).
- 4001 J StSacramento, CA 95819 (916) 453‑4545
- 5025 J St, Suite 312Sacramento, CA 95819 (916) 288‑0055
Specialties
- Vascular Surgeryprimary
- Internal Medicinealso
Other vascular surgeons in Sacramento
Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1971 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114018199 |
| 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