Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William P Brennan, MD

Individual provider Interventional Cardiology Physician · NPI 1487655858

Dr. William P Brennan, MD is an Interventional Cardiology Physician in Olympia, Washington. Licensed in Washington. Registered with an NPI since 2005.

Licensed in
WA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

500 Lilly Rd NE Ste 100
Olympia, WA 98506-5195
Phone: (360) 413-8525
Fax: (360) 913-8876
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence MD00022987 (WA)
Interventional Cardiology Physician Taxonomy 207RI0011X · Licence 22987 (WA)

Record details

NPI number1487655858
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 9, 2005
Last updated in NPPESApril 23, 2021
Certification dateApril 23, 2021

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