James Brennan, M.D.
NPI 1659634145 · Hematology (Internal Medicine) Physician · Clearwater, FL
James Brennan, M.D. is a Hematology (Internal Medicine) Physician provider in Clearwater, FL (NPI 1659634145).
Provider details
- NPI number
- 1659634145
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- ME 76349 (FL)
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
14 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
- 2012-06-19
- Last updated
- 2012-06-19
Frequently asked questions
- What is James Brennan's NPI number?
- James Brennan's National Provider Identifier (NPI) is 1659634145, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Brennan's specialty?
- James Brennan is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is James Brennan located?
- James Brennan's practice location on file with NPPES is 743 Eldorado Ave, Clearwater, FL 33767-1421.
- What is James Brennan's phone number?
- The practice phone number listed in the NPPES registry for James Brennan is (727) 443-7225.
- Is James Brennan's NPI active?
- Yes — James Brennan's NPI (1659634145) is active in the NPPES registry as of the last update on 2012-06-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.