Quick answers
- Which hospitals does John L. Bertolozzi work at?
- Medicare's official clinician data lists John L. Bertolozzi at 2 hospitals: Loyola Gottlieb Memorial Hospital and MacNeal Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John L. Bertolozzi see patients?
- Medicare's clinician data lists 2 practice locations, including Berwyn, IL and Melrose Park, IL. Call before your visit to confirm the address.
- What is John L. Bertolozzi's specialty?
- Medicare lists Anesthesiology as the primary specialty, and also Interventional Pain Management.
- Does John L. Bertolozzi accept Medicare assignment?
- Yes. Medicare's clinician data says John L. Bertolozzi 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 L. Bertolozzi?
- (708) 788-9100, as listed in official Medicare / NPI Registry data.
- What is John L. Bertolozzi's NPI number?
- 1407869779. 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 L. Bertolozzi works
Medicare's Facility Affiliation Data lists John L. Bertolozzi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Loyola Gottlieb Memorial HospitalMelrose Park, IL · Acute Care Hospital · CCN 140008
- MacNeal HospitalBerwyn, IL · Acute Care Hospital · CCN 140054
Practice locations
Addresses where John L. Bertolozzi is enrolled with Medicare (CMS data updated 2026-10-02).
- 3249 Oak Park AveBerwyn, IL 60402 (708) 788‑9100
- 701 W N AveMelrose Park, IL 60160 (708) 681‑3200
Group practices
Medicare enrollment lists John L. Bertolozzi as a member of these groups (CMS data updated 2026-10-02).
- Gottlieb Community Health Services Corporation38 clinicians in the group
- Encore Anesthesia Group LLC29 clinicians in the group
Specialties
- Anesthesiologyprimary
- Interventional Pain Managementalso
Other anesthesiologists in Berwyn
Clinicians with the same Medicare primary specialty in Berwyn, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407869779 |
| 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