Robert Williamson, MD
NPI 1821068305 · Internal Medicine Physician · Wilmington, MA
Robert Williamson, MD is a Internal Medicine Physician provider in Wilmington, MA (NPI 1821068305).
Provider details
- NPI number
- 1821068305
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 51661 (MA)
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
- 2006-01-25
- Last updated
- 2017-03-23
Frequently asked questions
- What is Robert Williamson's NPI number?
- Robert Williamson's National Provider Identifier (NPI) is 1821068305, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Williamson's specialty?
- Robert Williamson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Williamson located?
- Robert Williamson's practice location on file with NPPES is 500 Salem Street, Wilmington, MA 01887.
- What is Robert Williamson's phone number?
- The practice phone number listed in the NPPES registry for Robert Williamson is (978) 988-6000.
- Is Robert Williamson's NPI active?
- Yes — Robert Williamson's NPI (1821068305) is active in the NPPES registry as of the last update on 2017-03-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.