Brendan Sullivan, M.D.
NPI 1144660754 · Internal Medicine Physician · New York, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brendan Sullivan, M.D. is a Internal Medicine Physician provider in New York, NY (NPI 1144660754).
Provider details
- NPI number
- 1144660754
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 63815 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
6 documented practice locations
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
Additional practice locations (5)
- 755 Main StreetHartford, CT 06103Phone: (917) 261-4414
- 131 S Dearborn StChicago, IL 60603-5517Phone: (917) 261-4414Fax: (917) 261-4420
- 1 Post Office SqBoston, MA 02109-2106Phone: (917) 261-4414
- 1501 S Clinton StBaltimore, MD 21224-5730Phone: (866) 233-6925
- 530 5th Ave Fl 10New York, NY 10036-5114Phone: (917) 261-4414Fax: (917) 261-4420
Registry dates
- Enumerated
- 2013-06-27
- Last updated
- 2024-06-05
- Certified
- 2024-05-29
Frequently asked questions
- What is Brendan Sullivan's NPI number?
- Brendan Sullivan's National Provider Identifier (NPI) is 1144660754, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brendan Sullivan's specialty?
- Brendan Sullivan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brendan Sullivan located?
- Brendan Sullivan's practice location on file with NPPES is 80 Maiden Ln Ste 900, New York, NY 10038-4811.
- What is Brendan Sullivan's phone number?
- The practice phone number listed in the NPPES registry for Brendan Sullivan is (917) 261-4414.
- Does Brendan Sullivan accept Medicare?
- Brendan Sullivan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brendan Sullivan's NPI active?
- Yes — Brendan Sullivan's NPI (1144660754) is active in the NPPES registry as of the last update on 2024-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.