Quick answers
- Which hospitals does Nathaniel J. Merrell work at?
- Medicare's official clinician data lists Nathaniel J. Merrell at 2 hospitals: UMass Memorial Healthalliance Hospitals and UMass Memorial Medical Center/University Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathaniel J. Merrell see patients?
- Medicare's clinician data lists 1 practice location in Leominster, MA. Call before your visit to confirm the address.
- What is Nathaniel J. Merrell's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Nathaniel J. Merrell accept Medicare assignment?
- Yes. Medicare's clinician data says Nathaniel J. Merrell 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 Nathaniel J. Merrell?
- (978) 840-6481, as listed in official Medicare / NPI Registry data.
- What is Nathaniel J. Merrell's NPI number?
- 1922162262. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathaniel J. Merrell works
Medicare's Facility Affiliation Data lists Nathaniel J. Merrell at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UMass Memorial Healthalliance HospitalsLeominster, MA · Acute Care Hospital · CCN 220001
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · CCN 220163
Practice locations
Addresses where Nathaniel J. Merrell is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Hospital Rd, 2bLeominster, MA 01453 (978) 840‑6481
Group practices
Medicare enrollment lists Nathaniel J. Merrell as a member of this group (CMS data updated 2026-10-02).
- R Leslie Shelton MD PC2 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Massachusetts
Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Rochester School Of Medicine And Dentistry |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922162262 |
| 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