Gregory Nielsen
NPI 1629606181 · General Practice Dentistry · North Billerica, MA
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Nielsen is a General Practice Dentistry provider in North Billerica, MA (NPI 1629606181).
Provider details
- NPI number
- 1629606181
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Dental Providers
Student, Health Care
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 1215 Lee St # 800740Charlottesville, VA 22908-0816Phone: (434) 924-1774Fax: (434) 243-6378
Registry dates
- Enumerated
- 2020-03-31
- Last updated
- 2022-10-06
- Certified
- 2022-09-23
Frequently asked questions
- What is Gregory Nielsen's NPI number?
- Gregory Nielsen's National Provider Identifier (NPI) is 1629606181, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Nielsen's specialty?
- Gregory Nielsen is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Gregory Nielsen located?
- Gregory Nielsen's practice location on file with NPPES is 315 Boston Rd, North Billerica, MA 01862-2635.
- What is Gregory Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Gregory Nielsen is (978) 391-6783.
- Does Gregory Nielsen accept Medicare?
- Gregory Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Nielsen's NPI active?
- Yes — Gregory Nielsen's NPI (1629606181) is active in the NPPES registry as of the last update on 2022-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.