Quick answers
- Which hospitals does Elyssa Williams work at?
- Medicare's official clinician data lists Elyssa Williams at 3 hospitals: Athol Memorial Hospital, Baystate Franklin Medical Center and Heywood Hospital -. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Elyssa Williams see patients?
- Medicare's clinician data lists 1 practice location in Greenfield, MA. Call before your visit to confirm the address.
- What is Elyssa Williams's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Elyssa Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Elyssa Williams 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 Elyssa Williams's NPI number?
- 1164927349. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Elyssa Williams works
Medicare's Facility Affiliation Data lists Elyssa Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Athol Memorial HospitalAthol, MA · Critical Access Hospital · CCN 221303
- Baystate Franklin Medical CenterGreenfield, MA · Acute Care Hospital · CCN 220016
- Heywood Hospital -Gardner, MA · Acute Care Hospital · CCN 220095
Practice locations
Addresses where Elyssa Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 102 Main StGreenfield, MA 01301
Group practices
Medicare enrollment lists Elyssa Williams as a member of this group (CMS data updated 2026-10-02).
- Community Health Center of Franklin County Incorporated24 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Greenfield
Clinicians with the same Medicare primary specialty in Greenfield, MA — not a recommendation.
Clinician information
| Graduation year | 2023 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164927349 |
| 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