Quick answers
- Which hospitals does Donald Lewis work at?
- Medicare's official clinician data lists Donald Lewis at 3 hospitals: John Muir Medical Center - Concord Campus, John Muir Medical Center - Walnut Creek Campus and San Ramon Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Donald Lewis see patients?
- Medicare's clinician data lists 6 practice locations, including Brentwood, CA, Walnut Creek, CA and Oakland, CA. Call before your visit to confirm the address.
- What is Donald Lewis's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty, and also Hand Surgery.
- Does Donald Lewis accept Medicare assignment?
- Yes. Medicare's clinician data says Donald Lewis 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 Donald Lewis?
- (925) 939-8585, as listed in official Medicare / NPI Registry data.
- What is Donald Lewis's NPI number?
- 1508816851. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Donald Lewis works
Medicare's Facility Affiliation Data lists Donald Lewis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · CCN 050180
- San Ramon Regional Medical CenterSan Ramon, CA · Acute Care Hospital · CCN 050689
Practice locations
Addresses where Donald Lewis is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 101 Sand Creek Rd, Suite BBrentwood, CA 94513 (925) 939‑8585
- 2405 Shadelands DrWalnut Creek, CA 94598 (925) 939‑8585
- 2625 Shadelands DrWalnut Creek, CA 94598 (925) 939‑8585
- 3315 BroadwayOakland, CA 94611 (800) 943‑8099
- 350 John Muir Pkwy, Suite 155Brentwood, CA 94513 (925) 939‑8585
Group practices
Medicare enrollment lists Donald Lewis as a member of this group (CMS data updated 2026-10-02).
- Golden State Orthopedics and Spine182 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
- Hand Surgeryalso
Other orthopedic surgeons in Brentwood
Clinicians with the same Medicare primary specialty in Brentwood, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508816851 |
| 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