Quick answers
- Where does John Welter see patients?
- Medicare's clinician data lists 1 practice location in Derry, NH. Call before your visit to confirm the address.
- What is John Welter's specialty?
- Medicare lists Family Practice as the primary specialty, and also Osteopathic Manipulative Medicine.
- Does John Welter accept Medicare assignment?
- Yes. Medicare's clinician data says John Welter 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 John Welter?
- (603) 537-1300, as listed in official Medicare / NPI Registry data.
- What is John Welter's NPI number?
- 1982674503. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John Welter is enrolled with Medicare (CMS data updated 2026-10-02).
- 6 Tsienneto Rd, Suite 100Derry, NH 03038 (603) 537‑1300
Group practices
Medicare enrollment lists John Welter as a member of this group (CMS data updated 2026-10-02).
- Derry Medical Center, PA99 clinicians in the group
Specialties
Other family doctors in Derry
Clinicians with the same Medicare primary specialty in Derry, NH — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of New England, College Of Osteo Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982674503 |
| 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
- 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