Gregory Neilley, MD
NPI 1336117852 · Internal Medicine Physician · Peterborough, NH
Gregory Neilley, MD is a Internal Medicine Physician provider in Peterborough, NH (NPI 1336117852).
Provider details
- NPI number
- 1336117852
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 8060 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-09
- Last updated
- 2015-11-09
Frequently asked questions
- What is Gregory Neilley's NPI number?
- Gregory Neilley's National Provider Identifier (NPI) is 1336117852, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Neilley's specialty?
- Gregory Neilley is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Neilley located?
- Gregory Neilley's practice location on file with NPPES is 454 Old Street Rd, Peterborough, NH 03458-1200.
- What is Gregory Neilley's phone number?
- The practice phone number listed in the NPPES registry for Gregory Neilley is (603) 924-4680.
- Is Gregory Neilley's NPI active?
- Yes — Gregory Neilley's NPI (1336117852) is active in the NPPES registry as of the last update on 2015-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.