Quick answers
- Which hospitals does John P. Marenco work at?
- Medicare's official clinician data lists John P. Marenco at 5 hospitals: Baystate Medical Center, Holyoke Medical Center, Mercy Medical Center, St Francis Hospital & Medical Center and The Cooley Dickinson Hospital Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John P. Marenco see patients?
- Medicare's clinician data lists 4 practice locations, including Hartford, CT, Springfield, MA and Enfield, CT. Call before your visit to confirm the address.
- What is John P. Marenco's specialty?
- Medicare lists Cardiac Electrophysiology as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does John P. Marenco accept Medicare assignment?
- Yes. Medicare's clinician data says John P. Marenco 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 P. Marenco?
- (413) 748-7095, as listed in official Medicare / NPI Registry data.
- What is John P. Marenco's NPI number?
- 1669441374. 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 P. Marenco works
Medicare's Facility Affiliation Data lists John P. Marenco at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baystate Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220077
- Holyoke Medical CenterHolyoke, MA · Acute Care Hospital · CCN 220024
- Mercy Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220066
- St Francis Hospital & Medical CenterHartford, CT · Acute Care Hospital · CCN 070002
- The Cooley Dickinson Hospital IncNorthampton, MA · Acute Care Hospital · CCN 220015
Practice locations
Addresses where John P. Marenco is enrolled with Medicare (CMS data updated 2026-10-02).
- 114 Woodland StHartford, CT 06105 (413) 748‑7095
- 2 Medical Ctr Dr, Suite 410Springfield, MA 01107 (413) 748‑7095
- 300 Stafford St, Suite 154Springfield, MA 01104 (413) 748‑7095
- 9 Cranbrook Blvd, Fl 2Enfield, CT 06082 (413) 748‑7095
Group practices
Medicare enrollment lists John P. Marenco as a member of this group (CMS data updated 2026-10-02).
- Pioneer Valley Cardiology Associates, Inc26 clinicians in the group
Specialties
Find other Cardiac Electrophysiology doctors in Connecticut →
Other cardiac electrophysiologists in Hartford
Clinicians with the same Medicare primary specialty in Hartford, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669441374 |
| 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