John Sullivan, M.D.
NPI 1821072547 · Pediatric Allergy/Immunology Physician · Worcester, MA
John Sullivan, M.D. is a Pediatric Allergy/Immunology Physician provider in Worcester, MA (NPI 1821072547).
Provider details
- NPI number
- 1821072547
- Entity type
- Individual
- Primary specialty
- Pediatric Allergy/Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 42650 (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
- 2005-12-06
- Last updated
- 2020-11-09
- Certified
- 2020-11-09
Frequently asked questions
- What is John Sullivan's NPI number?
- John Sullivan's National Provider Identifier (NPI) is 1821072547, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Sullivan's specialty?
- John Sullivan is listed in the NPPES registry with a primary specialty of Pediatric Allergy/Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is John Sullivan located?
- John Sullivan's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.
- What is John Sullivan's phone number?
- The practice phone number listed in the NPPES registry for John Sullivan is (508) 856-1572.
- Is John Sullivan's NPI active?
- Yes — John Sullivan's NPI (1821072547) is active in the NPPES registry as of the last update on 2020-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.