Quick answers
- Which hospitals does Robert A. Petrossian work at?
- Medicare's official clinician data lists Robert A. Petrossian at 5 hospitals: Anderson Hospital, HSHS St Elizabeth's Hospital, OSF Saint Anthony's Health Center, St Josephs Hospital and St Lukes Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert A. Petrossian see patients?
- Medicare's clinician data lists 1 practice location in Saint Louis, MO. Call before your visit to confirm the address.
- What is Robert A. Petrossian's specialty?
- Medicare lists Urology as the primary specialty.
- Does Robert A. Petrossian accept Medicare assignment?
- Yes. Medicare's clinician data says Robert A. Petrossian 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 Robert A. Petrossian?
- (314) 567-6071, as listed in official Medicare / NPI Registry data.
- What is Robert A. Petrossian's NPI number?
- 1912436015. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert A. Petrossian works
Medicare's Facility Affiliation Data lists Robert A. Petrossian at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Anderson HospitalMaryville, IL · Acute Care Hospital · CCN 140289
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · CCN 140187
- OSF Saint Anthony's Health CenterAlton, IL · Acute Care Hospital · CCN 140052
- St Josephs HospitalBreese, IL · Acute Care Hospital · CCN 140145
- St Lukes HospitalChesterfield, MO · Acute Care Hospital · CCN 260179
Practice locations
Addresses where Robert A. Petrossian is enrolled with Medicare (CMS data updated 2026-10-02).
- 12855 N 40 Dr, Suite 375Saint Louis, MO 63141 (314) 567‑6071
Group practices
Medicare enrollment lists Robert A. Petrossian as a member of this group (CMS data updated 2026-10-02).
- Urology of St Louis Inc94 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Oakland Univ, William Beaumont School Of Medicine |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912436015 |
| 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