Quick answers
- Which hospitals does Thomas Lis work at?
- Medicare's official clinician data lists Thomas Lis at 1 hospital: Berkshire Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas Lis see patients?
- Medicare's clinician data lists 1 practice location in Williamstown, MA. Call before your visit to confirm the address.
- What is Thomas Lis's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Thomas Lis accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas Lis 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 Thomas Lis?
- (413) 346-1845, as listed in official Medicare / NPI Registry data.
- What is Thomas Lis's NPI number?
- 1184736795. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas Lis works
Medicare's Facility Affiliation Data lists Thomas Lis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Berkshire Medical CenterPittsfield, MA · Acute Care Hospital · CCN 220046
Practice locations
Addresses where Thomas Lis is enrolled with Medicare (CMS data updated 2026-10-02).
- 197 Adams RdWilliamstown, MA 01267 (413) 346‑1845
Group practices
Medicare enrollment lists Thomas Lis as a member of this group (CMS data updated 2026-10-02).
- Berkshire Faculty Services Inc276 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Williamstown
Clinicians with the same Medicare primary specialty in Williamstown, MA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184736795 |
| 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