William P. Brennan, MD
Cardiovascular Disease Physician · Olympia, WA
William P. Brennan, MD is a cardiovascular disease physician with a practice address in Olympia, Washington, and NPI 1487655858, issued on Aug 9, 2005. Check the license (Washington MD00022987, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- William P. Brennan
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- MD00022987 WA
22987 WA
Self-reported in NPPES; status is on the state search - Practice location
- 500 Lilly RD NE, Olympia, WA 98506
- Phone
- (360) 413-8525
- Enumerated
- Aug 9, 2005
- Record last updated
- Apr 23, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (360) 913-8876
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 512 in Washington → Look up another NPI →
Also registered at 500 Lilly RD NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Brottem, MDSpecialist1972566818
- Ester Brown, LPNLicensed Practical Nurse1770936015
- Jeffrey Christenson, MDSpecialist1932162872
- William Gavin, MDCardiovascular Disease Physician1285635730
- Theodore Johnson, PH.D.Clinical Psychologist1356446777
- James Kruidenier, MDGastroenterology Physician1497736573
Verify William P. Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00022987Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
11 Medicare Part D claims, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William P. Brennan among 512 cardiovascular disease physician records in Washington
William P. Brennan, MD is one of 512 cardiovascular disease physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Washington
There are 512 cardiovascular disease physician records in Washington.
All 512 in Washington → Every provider in Olympia → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Natasha Arora, MDOlympia, WA 985061336456672
- William Gavin, MDOlympia, WA 985061285635730
- Brad Howard, DOOlympia, WA 985061083100887
- Yuxuan Hu, MDOlympia, WA 985061407381759
- Qiang Li, MDOlympia, WA 985061861446494
- Sara Martinez, M.D., PH.D.Olympia, WA 985061750543906
- Tran Nguyen, MDOlympia, WA 985061750878831
- David Schoening, MDOlympia, WA 985061871594325
Common questions
What is William P. Brennan, MD's NPI number?
William P. Brennan, MD's National Provider Identifier (NPI) is 1487655858, issued on Aug 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William P. Brennan, MD located?
The NPPES record lists a practice address at 500 Lilly RD NE, Olympia, WA, 98506. Phone: (360) 413-8525. Providers update this record themselves, so call before visiting.
How can I verify William P. Brennan, MD's license?
NPPES lists Washington license number MD00022987, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William P. Brennan, MD prescribe under Medicare Part D?
In 2024, William P. Brennan, MD had 11 Medicare Part D claims; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.