Quick answers
- Which hospitals does Matthew Sullivan work at?
- Medicare's official clinician data lists Matthew Sullivan at 5 hospitals: Cheshire Medical Center, Mary Hitchcock Memorial Hospital, Mt Ascutney Hospital, New London Hospital and Valley Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew Sullivan see patients?
- Medicare's clinician data lists 3 practice locations, including Lebanon, NH and Claremont, NH. Call before your visit to confirm the address.
- What is Matthew Sullivan's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hematology/Oncology.
- Does Matthew Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew Sullivan 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 Matthew Sullivan offer telehealth?
- Medicare's clinician data says Matthew Sullivan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Matthew Sullivan?
- (603) 650-5000, as listed in official Medicare / NPI Registry data.
- What is Matthew Sullivan's NPI number?
- 1104104918. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew Sullivan works
Medicare's Facility Affiliation Data lists Matthew Sullivan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cheshire Medical CenterKeene, NH · Acute Care Hospital · CCN 300019
- Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · CCN 300003
- Mt Ascutney HospitalWindsor, VT · Critical Access Hospital · CCN 471302
- New London HospitalNew London, NH · Critical Access Hospital · CCN 301304
- Valley Regional HospitalClaremont, NH · Critical Access Hospital · CCN 301308
Practice locations
Addresses where Matthew Sullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Medical Ctr DrLebanon, NH 03756 (603) 650‑5000
- 243 Elm StClaremont, NH 03743 (603) 542‑6777
- 243 Elm St, Urgent Care at Valley RegionalClaremont, NH 03743 (603) 542‑7888
Group practices
Medicare enrollment lists Matthew Sullivan as a member of these groups (CMS data updated 2026-10-02).
- Dartmouth-Hitchcock Clinic1,472 clinicians in the group
- Mary Hitchcock Memorial Hospital1,280 clinicians in the group
- Valley Regional Hospital Inc34 clinicians in the group
Specialties
- Internal Medicineprimary
- Hematology/Oncologyalso
Other internal medicine doctors in Lebanon
Clinicians with the same Medicare primary specialty in Lebanon, NH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Geisel School Of Medicine At Dartmouth |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1104104918 |
| 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