Dr. William P. Brennan, MD
- Medicare services, 2018
- 947
- Part D claims, 2024
- 11
- Hospital affiliations
- 1
- Industry payments
- $151
- Medical group
- 1
- Practice address
- 413 Lilly Road NE, Olympia, WA 98506
- Practice phone
- Call (360) 493-7179
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Brennan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William P. Brennan is a cardiologist in Olympia, Washington
Dr. Brennan practices at Providence St. Peter Hospital in Olympia, Washington, part of Providence Health & Services.
Dr. Brennan's NPI, 1487655858, was assigned on August 9, 2005. Dr. Brennan holds Washington license MD00022987.
- NPI
- 1487655858NPI Registry (opens in a new tab)
- NPI enumeration date
- August 9, 2005
- NPI status
- Active
- Practice phone
- (360) 493-7179
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William P. Brennan practices at Providence St. Peter Hospital in Olympia, Washington
Dr. Brennan's primary practice is Providence St. Peter Hospital, at 413 Lilly Road NE, Olympia, WA 98506 in Thurston County. The practice phone is (360) 493-7179.
- Providence St. Peter Hospital413 Lilly Road NE, Olympia, WA 98506 · Thurston CountyPhone(360) 493-7179
Source: Dmand AI Affiliation Data
Dr. William P. Brennan is affiliated with 2 sites of care and 1 medical group
Dr. Brennan's primary practice is Providence St. Peter Hospital in Olympia, Washington, part of Providence Health & Services. The medical group on file is Providence. Dmand AI also links Dr. Brennan to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William P. Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Brennan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence St. Peter Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Providence Health & Services and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William P. Brennan is one of 416 cardiologists in Washington
Cardiovascular disease is Dr. Brennan's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Brennan is licensed in Washington.
Specialties and state licenses
- Cardiovascular disease, WashingtonPrimary
Cardiologists near Dr. Brennan
Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William P. Brennan billed Medicare for 947 services in 2018
CMS data shows 947 Medicare services from Dr. Brennan across 8 procedure codes in 2018. Medicare paid $47,086 for them. Every service was in an office.
Dr. Brennan's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 7582018: 67411%
- Tests and treatments
- 2017: 4892018: 27344%
Dr. Brennan compared with the Washington median for cardiologists, 2018
- Dr. Brennan
- Washington median
- Medicare services
- 947vs 1,52038% below
- Part D claims
- 233vs 1,72186% below
Medians across 425 cardiologists in Washington with Dmand AI profiles that report each measure.
Dr. Brennan's most billed Medicare procedure codes, 2018
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Brennan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Brennan and other cardiologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William P. Brennan's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Dr. Brennan's median patient age at 80, with 38% women.
Dr. Brennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women38%
- Men62%
Source: Dmand AI Patient Panel Data
Dr. William P. Brennan wrote 11 Medicare Part D claims in 2024
In 2024, Dr. Brennan wrote 11 Medicare Part D claims. 100% of them were for generic drugs. They cover 10 drugs, with $22,698 in total drug cost. In 2018, CMS named 1,577 claims across 26 drugs.
Dr. Brennan's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 1,5772019: 23385%
Drugs named by CMS: 10 in 2019, 26 in 2018.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. William P. Brennan received $151 in industry payments from 2016 to 2017
CMS Open Payments shows 7 general payments to Dr. Brennan from 4 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $83.
General payments to Dr. Brennan by program year, 2016 to 2017
Companies that paid Dr. Brennan the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William P. Brennan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William P. Brennan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. William P. Brennan's NPI number?
Dr. William P. Brennan's NPI number is 1487655858. It was assigned on August 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William P. Brennan?
Dr. William P. Brennan is a cardiologist in Olympia, Washington. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. William P. Brennan practice?
Dr. Brennan practices at 413 Lilly Road NE, Olympia, WA 98506. Dr. Brennan's primary practice is Providence St. Peter Hospital in Olympia, Washington, part of Providence Health & Services. Dmand AI also links Dr. Brennan to 1 group practice or clinic.
What is Dr. William P. Brennan's office phone number?
The practice phone on file for Dr. Brennan is (360) 493-7179.
What is Dr. William P. Brennan's medical license number?
Dr. Brennan holds Washington license MD00022987.
Which hospitals is Dr. William P. Brennan affiliated with?
Dr. Brennan practices at Providence St. Peter Hospital in Olympia, Washington.
What medical group is Dr. William P. Brennan part of?
Dr. Brennan is linked to Providence.
Does Dr. William P. Brennan accept Medicare?
Yes. CMS data shows Dr. Brennan billed Medicare for 947 services in 2018.
What services does Dr. William P. Brennan bill to Medicare?
In 2018, Dr. Brennan's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and heart test or procedure (93000).
What drugs does Dr. William P. Brennan prescribe most?
In 2019 Medicare Part D data, Dr. Brennan's most prescribed drugs by claims were Metoprolol Tartrate, Atorvastatin Calcium and Furosemide.
Has Dr. William P. Brennan received payments from drug or device companies?
CMS Open Payments shows $151 in general payments to Dr. Brennan from 4 companies from 2016 to 2017. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. William P. Brennan been practicing?
Dr. Brennan's NPI was assigned in 2005.
Selling to cardiovascular disease practices?
See cardiologists in Washington by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card