Quick answers
- Which hospitals does Mark I. Jacobs work at?
- Medicare's official clinician data lists Mark I. Jacobs at 1 hospital: Windham Community Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark I. Jacobs see patients?
- Medicare's clinician data lists 1 practice location in Willimantic, CT. Call before your visit to confirm the address.
- What is Mark I. Jacobs's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Mark I. Jacobs accept Medicare assignment?
- Yes. Medicare's clinician data says Mark I. Jacobs 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 I. Jacobs?
- (860) 456-3078, as listed in official Medicare / NPI Registry data.
- What is Mark I. Jacobs's NPI number?
- 1487638409. 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 I. Jacobs works
Medicare's Facility Affiliation Data lists Mark I. Jacobs at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Windham Community Memorial HospitalWillimantic, CT · Acute Care Hospital · CCN 070021
Practice locations
Addresses where Mark I. Jacobs is enrolled with Medicare (CMS data updated 2026-10-02).
- 5 Founders St, Suite 102Willimantic, CT 06226 (860) 456‑3078
Group practices
Medicare enrollment lists Mark I. Jacobs as a member of this group (CMS data updated 2026-10-02).
- Hartford Healthcare Medical Group Specialists PLLC1,588 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Connecticut →
Other cardiologists in Willimantic
Clinicians with the same Medicare primary specialty in Willimantic, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Connecticut School Of Medicine |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487638409 |
| 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