John Sullivan, MD
NPI 1275506578 · Clinical Neurophysiology Physician · Longmeadow, MA
John Sullivan, MD is a Clinical Neurophysiology Physician provider in Longmeadow, MA (NPI 1275506578).
Provider details
- NPI number
- 1275506578
- Entity type
- Individual
- Primary specialty
- Clinical Neurophysiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 35840 (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
- 2006-02-08
- Last updated
- 2025-09-11
Frequently asked questions
- What is John Sullivan's NPI number?
- John Sullivan's National Provider Identifier (NPI) is 1275506578, 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 Clinical Neurophysiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Sullivan located?
- John Sullivan's practice location on file with NPPES is 175 Dwight Rd, Longmeadow, MA 01106.
- What is John Sullivan's phone number?
- The practice phone number listed in the NPPES registry for John Sullivan is (413) 737-4746.
- Is John Sullivan's NPI active?
- Yes — John Sullivan's NPI (1275506578) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.