Quick answers
- Which hospitals does Gregorius Penilla work at?
- Medicare's official clinician data lists Gregorius Penilla at 5 hospitals: Mercy Hospital St Louis, Missouri Baptist Medical Center, SSM Health St Mary's Hospital - St Louis, SSM St Clare Health Center and St Lukes Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregorius Penilla see patients?
- Medicare's clinician data lists 2 practice locations, including Saint Louis, MO and Fenton, MO. Call before your visit to confirm the address.
- What is Gregorius Penilla's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Gregorius Penilla accept Medicare assignment?
- Yes. Medicare's clinician data says Gregorius Penilla 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 Gregorius Penilla offer telehealth?
- Medicare's clinician data says Gregorius Penilla offers telehealth services. Ask the office which visits can be done by video or phone.
- What is Gregorius Penilla's NPI number?
- 1023024973. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregorius Penilla works
Medicare's Facility Affiliation Data lists Gregorius Penilla 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 St Mary's Hospital - St LouisSaint Louis, MO · Acute Care Hospital · CCN 260091
- SSM St Clare Health CenterFenton, MO · Acute Care Hospital · CCN 260081
- St Lukes HospitalChesterfield, MO · Acute Care Hospital · CCN 260179
Practice locations
Addresses where Gregorius Penilla is enrolled with Medicare (CMS data updated 2026-10-02).
- 1035 Bellevue Ave, Suite 500Saint Louis, MO 63117
- 1345 Smizer Mill RdFenton, MO 63026
Group practices
Medicare enrollment lists Gregorius Penilla as a member of this group (CMS data updated 2026-10-02).
- SSM Medical Group Inc568 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1023024973 |
| 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