Quick answers
- Which hospitals does Louis Mazzarelli work at?
- Medicare's official clinician data lists Louis Mazzarelli at 4 hospitals: Lawrence & Memorial Hospital, Westerly Hospital, William W Backus Hospital and Yale-New Haven Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Louis Mazzarelli see patients?
- Medicare's clinician data lists 5 practice locations, including East Lyme, CT, Westerly, RI and New London, CT. Call before your visit to confirm the address.
- What is Louis Mazzarelli's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Louis Mazzarelli accept Medicare assignment?
- Yes. Medicare's clinician data says Louis Mazzarelli 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 Louis Mazzarelli?
- (860) 444-5151, as listed in official Medicare / NPI Registry data.
- What is Louis Mazzarelli's NPI number?
- 1114978194. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Louis Mazzarelli works
Medicare's Facility Affiliation Data lists Louis Mazzarelli at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lawrence & Memorial HospitalNew London, CT · Acute Care Hospital · CCN 070007
- Westerly HospitalWesterly, RI · Acute Care Hospital · CCN 410013
- William W Backus HospitalNorwich, CT · Acute Care Hospital · CCN 070024
- Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · CCN 070022
Practice locations
Addresses where Louis Mazzarelli is enrolled with Medicare (CMS data updated 2026-10-02).
- 18 Darrows RdgEast Lyme, CT 06333 (860) 444‑5151
- 20 Darrows RdgEast Lyme, CT 06333 (860) 442‑0711
- 25 Wells StWesterly, RI 02891 (860) 442‑0711
- 365 Montauk AveNew London, CT 06320 (860) 442‑0711
- 52 Hazelnut Hill RdGroton, CT 06340 (860) 442‑0711
Group practices
Medicare enrollment lists Louis Mazzarelli as a member of this group (CMS data updated 2026-10-02).
- Ocean Radiology Associates PC30 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Connecticut
Clinicians with the same Medicare primary specialty in Connecticut — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114978194 |
| 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