1. Home
  2. Directory
  3. Washington
  4. Olympia
  5. Internal Medicine
  6. NPI Profile

DR. WILLIAM P BRENNAN MD
NPI 1487655858
Internal Medicine - Cardiovascular Disease in Olympia, WA

Active since August 09, 2005PECOS Enrolled
500 LILLY RD NE, STE 100, OLYMPIA, WA 98506(360) 413-8525(360) 913-8876 Get Directions Write a Review

NPPES record last updated: April 23, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. William P Brennan Md NPPES

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

DR. WILLIAM P BRENNAN MD (NPI 1487655858) is an individual cardiovascular disease provider in Olympia, Washington, licensed in Washington (MD00022987) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1487655858
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDR. WILLIAM P BRENNANCredential: MD
Location Address500 LILLY RD NE, STE 100Olympia, WA 98506-5195
Mailing Address500 Lilly Rd Ne, Ste 100Olympia, WA 98506-5195 · (360) 413-8525 · Fax (360) 913-8876
Phone(360) 413-8525
Fax(360) 913-8876
Sole ProprietorNo
Enumeration DateAugust 9, 2005
Last NPPES UpdateApril 23, 2021
NPPES CertifiedApril 23, 2021
✔ NPI 1487655858 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in WA · MD00022987
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.
Also ListedInternal Medicine · Interventional CardiologyTaxonomy 207RI0011X · License 22987 (WA)
500 LILLY RD NE, Olympia, WA 98506
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William P Brennan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98506 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.99 typical visit price
range $57.27 – $172.80
Typical copayment $32.74 (range $14.31 – $43.20)
Most-billed visit code 99204
Established Patient
$71.29 typical visit price
range $18.56 – $141.11
Typical copayment $17.82 (range $4.64 – $35.27)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. ROBERT C TOMFORD MD
Internal Medicine (Nephrology)
500 LILLY RD NE, SUITE 203
OLYMPIA, WA 98506
Thurston County (360) 413-8121
SAMANTHA MOORE PA-C
Physician Assistant
500 LILLY RD NE
OLYMPIA, WA 98506
Thurston County (360) 413-8250
DR. AUDREY MANTANONA PHARMD
Pharmacist
500 LILLY RD NE
OLYMPIA, WA 98506
Thurston County (360) 477-5101
DR. WILLIAM J MITCHELL MD
Specialist
500 LILLY RD NE, SUITE 204
OLYMPIA, WA 98506
Thurston County (360) 413-8250
MR. ELIJAH TELFARE P.A.
Physician Assistant (Surgical)
500 LILLY RD NE, SUITE 100
OLYMPIA, WA 98506
Thurston County (360) 491-4211
NORTHWEST RADIOLOGY GROUP LLC
Specialist
500 LILLY RD NE, SUITE 160
OLYMPIA, WA 98506
Thurston County (360) 413-8307
MR. PATRICK C WILLIAMS PA
Physician Assistant
500 LILLY RD NE, SUITE 204
OLYMPIA, WA 98506
Thurston County (360) 413-8250
SEATTLE VAMC
Clinic/Center (VA)
500 LILLY RD NE, STE 201 AND 204A
OLYMPIA, WA 98506
Thurston County (702) 341-3164

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 William Brennan's NPI number?

The NPI number for William Brennan is 1487655858. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

Where is William Brennan located?

William Brennan practices at 500 Lilly Rd NE Ste 100, Olympia, WA 98506. The listed phone number is (360) 413-8525.

What is William Brennan's specialty?

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

Is William Brennan enrolled in Medicare?

Yes. William Brennan is registered in the Medicare PECOS enrollment system.

What insurance does William Brennan accept?

Health plans from Providence Health Plan list William Brennan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Brennan was last updated on April 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.