Quick answers
- Which hospitals does William L. Hiser work at?
- Medicare's official clinician data lists William L. Hiser at 5 hospitals: Baystate Franklin Medical Center, Baystate Medical Center, Baystate Noble Hospital, Baystate Wing Hospital and Berkshire Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William L. Hiser see patients?
- Medicare's clinician data lists 1 practice location in Springfield, MA. Call before your visit to confirm the address.
- What is William L. Hiser's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does William L. Hiser accept Medicare assignment?
- Yes. Medicare's clinician data says William L. Hiser 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 L. Hiser?
- (413) 794-9338, as listed in official Medicare / NPI Registry data.
- What is William L. Hiser's NPI number?
- 1366481459. 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 L. Hiser works
Medicare's Facility Affiliation Data lists William L. Hiser at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Baystate Franklin Medical CenterGreenfield, MA · Acute Care Hospital · CCN 220016
- Baystate Medical CenterSpringfield, MA · Acute Care Hospital · CCN 220077
- Baystate Noble HospitalWestfield, MA · Acute Care Hospital · CCN 220065
- Baystate Wing HospitalPalmer, MA · Acute Care Hospital · CCN 220030
- Berkshire Medical CenterPittsfield, MA · Acute Care Hospital · CCN 220046
Practice locations
Addresses where William L. Hiser is enrolled with Medicare (CMS data updated 2026-10-02).
- 3350 Main StSpringfield, MA 01107 (413) 794‑9338
Group practices
Medicare enrollment lists William L. Hiser as a member of this group (CMS data updated 2026-10-02).
- Baystate Medical Practices Inc1,369 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Massachusetts →
Other cardiologists in Springfield
Clinicians with the same Medicare primary specialty in Springfield, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Southwestern Medical School At Dallas |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366481459 |
| 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