Quick answers
- Which hospitals does Mario Lysse work at?
- Medicare's official clinician data lists Mario Lysse at 3 hospitals: Baystate Franklin Medical Center, Baystate Medical Center and Baystate Wing Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mario Lysse see patients?
- Medicare's clinician data lists 4 practice locations, including Springfield, MA and Belchertown, MA. Call before your visit to confirm the address.
- What is Mario Lysse's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mario Lysse accept Medicare assignment?
- Yes. Medicare's clinician data says Mario Lysse 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.
- Does Mario Lysse offer telehealth?
- Medicare's clinician data says Mario Lysse offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mario Lysse?
- (413) 323-7212, as listed in official Medicare / NPI Registry data.
- What is Mario Lysse's NPI number?
- 1801106059. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mario Lysse works
Medicare's Facility Affiliation Data lists Mario Lysse 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 Wing HospitalPalmer, MA · Acute Care Hospital · CCN 220030
Practice locations
Addresses where Mario Lysse is enrolled with Medicare (CMS data updated 2026-10-02).
- 280 Chestnut St, Suite 2Springfield, MA 01199
- 759 Chestnut StSpringfield, MA 01107
- 759 Chestnut StSpringfield, MA 01199
- 95 Sargent StBelchertown, MA 01007 (413) 323‑7212
Group practices
Medicare enrollment lists Mario Lysse as a member of this group (CMS data updated 2026-10-02).
- Baystate Medical Practices Inc1,369 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Springfield
Clinicians with the same Medicare primary specialty in Springfield, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1801106059 |
| 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