Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Ryan Tomas Brennan, DO

Individual provider Neurology Physician · NPI 1649561978

Ryan Tomas Brennan, DO practises Neurology in Milwaukee, Wisconsin. Graduated from Michigan State University College of Osteopathic Medicine in 2011, 15 years ago. Practices with Froedtert Andthe Medical College of Wisconsin Community Physicians Inc, a 1,255-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Nebraska and Wisconsin.

Years since qualifying
15
Trained at
Michigan State University College of Osteopathic Medicine
Licensed in
NE, WI
In the registry since
2011
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

9200 W Wisconsin Ave Dept OF Neurology
Milwaukee, WI 53226-3522
Phone: (414) 805-5200
Fax: (414) 259-0469
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence 60539 (WI)
Neurology Physician Taxonomy 2084N0400X · Licence 1306 (NE)

Record details

NPI number1649561978
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 20, 2011
Last updated in NPPESJuly 21, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROLOGY
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2011 (15 years in practice)
Group practice Froedtert Andthe Medical College Of Wisconsin Community Physicians Inc — 1255 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients213
Services billed 6,712 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $386 10 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Froedtert Andthe Medical College of Wisconsin Community Physicians Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1255 clinicians in the practice; 12 are shown here.

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