Quick answers
- Which hospitals does John R D. Peterson work at?
- Medicare's official clinician data lists John R D. Peterson at 3 hospitals: Mercy Hospital Washington, Missouri Baptist Medical Center and Northwestern Medicine Central Dupage Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John R D. Peterson see patients?
- Medicare's clinician data lists 4 practice locations, including Creve Coeur, MO, Lake St Louis, MO and Independence, MO. Call before your visit to confirm the address.
- What is John R D. Peterson's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does John R D. Peterson accept Medicare assignment?
- Yes. Medicare's clinician data says John R D. Peterson 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 John R D. Peterson?
- (314) 400-9999, as listed in official Medicare / NPI Registry data.
- What is John R D. Peterson's NPI number?
- 1164639274. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John R D. Peterson works
Medicare's Facility Affiliation Data lists John R D. Peterson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · CCN 260052
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · CCN 260108
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
Practice locations
Addresses where John R D. Peterson is enrolled with Medicare (CMS data updated 2026-10-02).
- 11525 Olde Cabin Rd, Suite 101Creve Coeur, MO 63141 (314) 400‑9999
- 200 Brevco Plz, Suite 208Lake St Louis, MO 63367 (636) 561‑9020
- 3800 S Whitney AveIndependence, MO 64055 (816) 478‑4887
- 901 Patients 1st Dr, Suite 3300Washington, MO 63090 (636) 239‑7344
Group practices
Medicare enrollment lists John R D. Peterson as a member of these groups (CMS data updated 2026-10-02).
- Digestive Health Specialists LLC69 clinicians in the group
- Mercy Clinic Gastroenterology LLC67 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Creve Coeur
Clinicians with the same Medicare primary specialty in Creve Coeur, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164639274 |
| 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