Quick answers
- Which hospitals does Gretchen E. Twork work at?
- Medicare's official clinician data lists Gretchen E. Twork at 2 hospitals: Alice Peck Day Memorial Hospital and Mary Hitchcock Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gretchen E. Twork see patients?
- Medicare's clinician data lists 3 practice locations, including Lebanon, NH. Call before your visit to confirm the address.
- What is Gretchen E. Twork's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Gretchen E. Twork accept Medicare assignment?
- Yes. Medicare's clinician data says Gretchen E. Twork 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 Gretchen E. Twork?
- (603) 650-5000, as listed in official Medicare / NPI Registry data.
- What is Gretchen E. Twork's NPI number?
- 1588759872. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gretchen E. Twork works
Medicare's Facility Affiliation Data lists Gretchen E. Twork at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alice Peck Day Memorial HospitalLebanon, NH · Critical Access Hospital · CCN 301305
- Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · CCN 300003
Practice locations
Addresses where Gretchen E. Twork is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Medical Ctr DrLebanon, NH 03756 (603) 650‑5000
- 10 Alice Peck Day DrLebanon, NH 03766 (603) 448‑3121
- 5 Alice Peck Day DrLebanon, NH 03766 (603) 448‑3122
Group practices
Medicare enrollment lists Gretchen E. Twork as a member of these groups (CMS data updated 2026-10-02).
- Dartmouth-Hitchcock Clinic1,472 clinicians in the group
- Alice Peck Day Memorial Hospital132 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Lebanon
Clinicians with the same Medicare primary specialty in Lebanon, NH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588759872 |
| 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