Quick answers
- Which hospitals does Mark L. Ruggiero work at?
- Medicare's official clinician data lists Mark L. Ruggiero at 2 hospitals: Saint Mary's Hospital and Waterbury Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Ruggiero see patients?
- Medicare's clinician data lists 1 practice location in Waterbury, CT. Call before your visit to confirm the address.
- What is Mark L. Ruggiero's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Mark L. Ruggiero accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Ruggiero 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 Mark L. Ruggiero?
- (203) 573-1435, as listed in official Medicare / NPI Registry data.
- What is Mark L. Ruggiero's NPI number?
- 1396773644. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark L. Ruggiero works
Medicare's Facility Affiliation Data lists Mark L. Ruggiero at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Saint Mary's HospitalWaterbury, CT · Acute Care Hospital · CCN 070016
- Waterbury HospitalWaterbury, CT · Acute Care Hospital · CCN 070005
Practice locations
Addresses where Mark L. Ruggiero is enrolled with Medicare (CMS data updated 2026-10-02).
- 455 Chase PkwyWaterbury, CT 06708 (203) 573‑1435
Group practices
Medicare enrollment lists Mark L. Ruggiero as a member of this group (CMS data updated 2026-10-02).
- Cardiology Associates of Greater Waterbury, LLC6 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Connecticut →
Other cardiologists in Waterbury
Clinicians with the same Medicare primary specialty in Waterbury, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Geisel School Of Medicine At Dartmouth |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396773644 |
| 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