Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JAMES KEENE BRENNAN M.D.
NPI 1659634145
Internal Medicine - Hematology in Clearwater, FL

Q: What is James Brennan's NPI number?

The NPI number for James Brennan is 1659634145. It was assigned to this individual provider in the NPPES registry on June 19, 2012.

Q: What is James Brennan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.

Q: When was this NPI record last updated?

The NPPES record for James Brennan was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 19, 2012

743 ELDORADO AVE, CLEARWATER, FL 33767(727) 443-7225(727) 443-7225 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

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About Dr. James Keene Brennan M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JAMES KEENE BRENNAN M.D. (NPI 1659634145) is an individual hematology provider in Clearwater, Florida, licensed in Florida (ME 76349) and active in the NPI registry since June 2012.

NPPES Registry Identity

NPI1659634145

Entity TypeIndividualMale

Primary Taxonomy207RH0000X

Provider Legal NameDR. JAMES KEENE BRENNANCredential: M.D.

Location Address743 ELDORADO AVEClearwater, FL 33767-1421

Mailing Address743 Eldorado AveClearwater, FL 33767-1421 · (727) 443-7225 · Fax (727) 443-7225

Phone(727) 443-7225

Fax(727) 443-7225

Sole ProprietorYes

Enumeration DateJune 19, 2012

Last NPPES UpdateSeptember 29, 2026

✔ NPI 1659634145 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · HematologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0000X

License✔ Licensed in FL · ME 76349

Definition

An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.

743 ELDORADO AVE, Clearwater, FL 33767

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is James Brennan's NPI number?

The NPI number for James Brennan is 1659634145. It was assigned to this individual provider in the NPPES registry on June 19, 2012.

Where is James Brennan located?

James Brennan practices at 743 Eldorado Ave, Clearwater, FL 33767. The listed phone number is (727) 443-7225.

What is James Brennan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.

When was this NPI record last updated?

The NPPES record for James Brennan was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.