Quick answers
- Which hospitals does Keith A. Bernstein work at?
- Medicare's official clinician data lists Keith A. Bernstein at 3 hospitals: Mercy Hospital St Louis, Missouri Baptist Medical Center and St Lukes Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Keith A. Bernstein see patients?
- Medicare's clinician data lists 1 practice location in Chesterfield, MO. Call before your visit to confirm the address.
- What is Keith A. Bernstein's specialty?
- Medicare lists Rheumatology as the primary specialty.
- Does Keith A. Bernstein accept Medicare assignment?
- Yes. Medicare's clinician data says Keith A. Bernstein 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 Keith A. Bernstein?
- (314) 878-8058, as listed in official Medicare / NPI Registry data.
- What is Keith A. Bernstein's NPI number?
- 1447273727. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Keith A. Bernstein works
Medicare's Facility Affiliation Data lists Keith A. Bernstein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · CCN 260020
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
- St Lukes HospitalChesterfield, MO · Acute Care Hospital · CCN 260179
Practice locations
Addresses where Keith A. Bernstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 224 S Woods Mill RdChesterfield, MO 63017 (314) 878‑8058
Group practices
Medicare enrollment lists Keith A. Bernstein as a member of this group (CMS data updated 2026-10-02).
- Internal Medicine Associates, Ltd.3 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Chesterfield
Clinicians with the same Medicare primary specialty in Chesterfield, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447273727 |
| 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