Quick answers
- Which hospitals does Ronald J. Stewart work at?
- Medicare's official clinician data lists Ronald J. Stewart at 3 hospitals: Ascension Providence Rochester Hospital, Beaumont Hospital, Troy and Henry Ford Macomb Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald J. Stewart see patients?
- Medicare's clinician data lists 1 practice location in Lake Orion, MI. Call before your visit to confirm the address.
- What is Ronald J. Stewart's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does Ronald J. Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald J. Stewart 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 J. Stewart?
- (248) 693-0543, as listed in official Medicare / NPI Registry data.
- What is Ronald J. Stewart's NPI number?
- 1801889654. 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 J. Stewart works
Medicare's Facility Affiliation Data lists Ronald J. Stewart at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Providence Rochester HospitalRochester, MI · Acute Care Hospital · CCN 230254
- Beaumont Hospital, TroyTroy, MI · Acute Care Hospital · CCN 230269
- Henry Ford Macomb HospitalClinton Township, MI · Acute Care Hospital · CCN 230047
Practice locations
Addresses where Ronald J. Stewart is enrolled with Medicare (CMS data updated 2026-10-02).
- 1428 S Lapeer RdLake Orion, MI 48360 (248) 693‑0543
Group practices
Medicare enrollment lists Ronald J. Stewart as a member of this group (CMS data updated 2026-10-02).
- Women's Healthcare Associates of Oakland PLLC7 clinicians in the group
Specialties
Other internal medicine doctors in Lake Orion
Clinicians with the same Medicare primary specialty in Lake Orion, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1965 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801889654 |
| 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