John Sullivan, M.D.
NPI 1679984918 · Internal Medicine Physician · Stony Brook, NY
John Sullivan, M.D. is a Internal Medicine Physician provider in Stony Brook, NY (NPI 1679984918).
Provider details
- NPI number
- 1679984918
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 992000992 (NY)
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
12 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
- 2014-05-08
- Last updated
- 2014-05-08
Frequently asked questions
- What is John Sullivan's NPI number?
- John Sullivan's National Provider Identifier (NPI) is 1679984918, 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 Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Sullivan located?
- John Sullivan's practice location on file with NPPES is 101 Nicolls Rd, Stony Brook, NY 11794-0001.
- What is John Sullivan's phone number?
- The practice phone number listed in the NPPES registry for John Sullivan is (631) 444-4000.
- Is John Sullivan's NPI active?
- Yes — John Sullivan's NPI (1679984918) is active in the NPPES registry as of the last update on 2014-05-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.