Quick answers
- Which hospitals does William Santiago work at?
- Medicare's official clinician data lists William Santiago at 5 hospitals: Griffin Hospital, Hartford Hospital, Midstate Medical Center, The Hospital of Central Connecticut and Yale-New Haven Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Santiago see patients?
- Medicare's clinician data lists 2 practice locations, including New Britain, CT and Meriden, CT. Call before your visit to confirm the address.
- What is William Santiago's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does William Santiago accept Medicare assignment?
- Yes. Medicare's clinician data says William Santiago 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 William Santiago?
- (860) 224-5121, as listed in official Medicare / NPI Registry data.
- What is William Santiago's NPI number?
- 1568027373. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Santiago works
Medicare's Facility Affiliation Data lists William Santiago at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Griffin HospitalDerby, CT · Acute Care Hospital · CCN 070031
- Hartford HospitalHartford, CT · Acute Care Hospital · CCN 070025
- Midstate Medical CenterMeriden, CT · Acute Care Hospital · CCN 070017
- The Hospital of Central ConnecticutNew Britain, CT · Acute Care Hospital · CCN 070035
- Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · CCN 070022
Practice locations
Addresses where William Santiago is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Grand StNew Britain, CT 06052 (860) 224‑5121
- 435 Lewis AveMeriden, CT 06451 (203) 238‑7747
Group practices
Medicare enrollment lists William Santiago as a member of these groups (CMS data updated 2026-10-02).
- The Hospital of Central Connecticut at New Britain General and Bradley399 clinicians in the group
- Midstate Medical Center186 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in New Britain
Clinicians with the same Medicare primary specialty in New Britain, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Connecticut School Of Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568027373 |
| 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