Quick answers
- Which hospitals does Jonathan A. Hammond work at?
- Medicare's official clinician data lists Jonathan A. Hammond at 2 hospitals: Hartford Hospital and John Dempsey Hospital of the University of Connect…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jonathan A. Hammond see patients?
- Medicare's clinician data lists 2 practice locations, including Farmington, CT and Hartford, CT. Call before your visit to confirm the address.
- What is Jonathan A. Hammond's specialty?
- Medicare lists Cardiac Surgery as the primary specialty, and also Thoracic Surgery.
- Does Jonathan A. Hammond accept Medicare assignment?
- Yes. Medicare's clinician data says Jonathan A. Hammond 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 Jonathan A. Hammond?
- (860) 679-3692, as listed in official Medicare / NPI Registry data.
- What is Jonathan A. Hammond's NPI number?
- 1235115965. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jonathan A. Hammond works
Medicare's Facility Affiliation Data lists Jonathan A. Hammond at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hartford HospitalHartford, CT · Acute Care Hospital · CCN 070025
- John Dempsey Hospital of the University of Connect…Farmington, CT · Acute Care Hospital · CCN 070036
Practice locations
Addresses where Jonathan A. Hammond is enrolled with Medicare (CMS data updated 2026-10-02).
- 263 Farmington AveFarmington, CT 06030 (860) 679‑3692
- 85 Seymour St, Suite 919Hartford, CT 06106 (860) 696‑5520
Group practices
Medicare enrollment lists Jonathan A. Hammond as a member of these groups (CMS data updated 2026-10-02).
- Hartford Healthcare Medical Group Specialists PLLC1,588 clinicians in the group
- University of Connecticut Health Center639 clinicians in the group
Specialties
- Cardiac Surgeryprimary
- Thoracic Surgeryalso
Other cardiac surgeons in Connecticut
Clinicians with the same Medicare primary specialty in Connecticut — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235115965 |
| 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