Quick answers
- Which hospitals does Leonard M. Hoffmann work at?
- Medicare's official clinician data lists Leonard M. Hoffmann at 5 hospitals: Mercy Hospital St Louis, Missouri Baptist Medical Center, SSM Health Depaul Hospital St Louis, SSM St Joseph Health Center and SSM St Joseph Hospital West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Leonard M. Hoffmann see patients?
- Medicare's clinician data lists 2 practice locations, including O Fallon, MO and Saint Louis, MO. Call before your visit to confirm the address.
- What is Leonard M. Hoffmann's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Leonard M. Hoffmann accept Medicare assignment?
- Yes. Medicare's clinician data says Leonard M. Hoffmann 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.
- Does Leonard M. Hoffmann offer telehealth?
- Medicare's clinician data says Leonard M. Hoffmann offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Leonard M. Hoffmann?
- (636) 379-6363, as listed in official Medicare / NPI Registry data.
- What is Leonard M. Hoffmann's NPI number?
- 1174585665. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Leonard M. Hoffmann works
Medicare's Facility Affiliation Data lists Leonard M. Hoffmann 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
- SSM Health Depaul Hospital St LouisBridgeton, MO · Acute Care Hospital · CCN 260104
- SSM St Joseph Health CenterSaint Charles, MO · Acute Care Hospital · CCN 260005
- SSM St Joseph Hospital WestLake Saint Louis, MO · Acute Care Hospital · CCN 260200
Practice locations
Addresses where Leonard M. Hoffmann is enrolled with Medicare (CMS data updated 2026-10-02).
- 1101 Hwy KO Fallon, MO 63366 (636) 379‑6363
- 7212 Balson AveSaint Louis, MO 63130
Group practices
Medicare enrollment lists Leonard M. Hoffmann as a member of these groups (CMS data updated 2026-10-02).
- SSM Medical Group Inc568 clinicians in the group
- Aging Well Health Care, LLC238 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in O Fallon
Clinicians with the same Medicare primary specialty in O Fallon, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1174585665 |
| 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