William Jackson, M.D.
NPI 1003843590 · Gastroenterology Physician · Salisbury, MA
William Jackson, M.D. is a Gastroenterology Physician provider in Salisbury, MA (NPI 1003843590).
Provider details
- NPI number
- 1003843590
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 57551 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-06-28
- Last updated
- 2014-11-13
Frequently asked questions
- What is William Jackson's NPI number?
- William Jackson's National Provider Identifier (NPI) is 1003843590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Jackson's specialty?
- William Jackson is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Jackson located?
- William Jackson's practice location on file with NPPES is 46 Toll Rd, Salisbury, MA 01952-1435.
- What is William Jackson's phone number?
- The practice phone number listed in the NPPES registry for William Jackson is (978) 462-3009.
- Is William Jackson's NPI active?
- Yes — William Jackson's NPI (1003843590) is active in the NPPES registry as of the last update on 2014-11-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.