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MICHAEL DOUGLAS WILLIAMSON MD
NPI 1831180421
Internal Medicine - Cardiovascular Disease in Clearwater, FL

Active since November 02, 2005
455 PINELLAS ST, STE 400, CLEARWATER, FL 33756(727) 445-1911(727) 445-1986 Get Directions Write a Review

NPPES record last updated: October 26, 2012. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Michael Douglas Williamson Md NPPES

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

MICHAEL DOUGLAS WILLIAMSON MD (NPI 1831180421) is an individual cardiovascular disease provider in Clearwater, Florida, licensed in Florida (ME31396) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1831180421
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameMICHAEL DOUGLAS WILLIAMSONCredential: MD
Location Address455 PINELLAS ST, STE 400Clearwater, FL 33756-3354
Mailing Address455 Pinellas St, Ste 400Clearwater, FL 33756-3354 · (727) 445-1992 · Fax (727) 445-1993
Phone(727) 445-1911
Fax(727) 445-1986
Sole ProprietorNo
Enumeration DateNovember 2, 2005
Last NPPES UpdateOctober 26, 2012
✔ NPI 1831180421 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in FL · ME31396
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
455 PINELLAS ST, Clearwater, FL 33756
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Other Identifiers 4

Medicare UPIND58643
Medicaid03642230FL
Other79087FL · Blue Cross Blue Shield
Medicare ID-Type Unspecified79087Z

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KERRIE MICHELLE COFFMAN ARNP
Nurse Practitioner
455 PINELLAS ST, SUITE 400
CLEARWATER, FL 33756
Pinellas County (727) 445-1992
DAVID DANIEL DIETERICH DO
Internal Medicine (Cardiovascular Disease)
455 PINELLAS ST, SUITE 400
CLEARWATER, FL 33756
Pinellas County (727) 445-1991
OLIVIA ANNE O'BERRY PA-C
Physician Assistant
455 PINELLAS ST, SUITE 400
CLEARWATER, FL 33756
Pinellas County (727) 445-1911
MRS. LAURA WALLACE ARNP
Nurse Practitioner
455 PINELLAS ST, SUITE #400
CLEARWATER, FL 33756
Pinellas County (727) 445-1911
MR. IAN WETHERALL PA-C
Physician Assistant (Surgical)
455 PINELLAS ST, SUITE 320
CLEARWATER, FL 33756
Pinellas County (727) 446-2273
DR. JOHN BROOKE TOURTELOT M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
455 PINELLAS ST
CLEARWATER, FL 33756
Pinellas County (727) 461-8300
PAUL LESLIE PHILLIPS MD
Internal Medicine (Cardiovascular Disease)
455 PINELLAS ST, STE 400
CLEARWATER, FL 33756
Pinellas County (727) 445-1911
SHANNON O'DONNELL LOFGREN PA-C
Physician Assistant
455 PINELLAS ST
CLEARWATER, FL 33756
Pinellas County (305) 322-6263

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 Michael Williamson's NPI number?

The NPI number for Michael Williamson is 1831180421. It was assigned to this individual provider in the NPPES registry on November 2, 2005.

Where is Michael Williamson located?

Michael Williamson practices at 455 Pinellas St Ste 400, Clearwater, FL 33756. The listed phone number is (727) 445-1911.

What is Michael Williamson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

When was this NPI record last updated?

The NPPES record for Michael Williamson was last updated on October 26, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.