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

William Matthew Walker, DO

Individual provider Family Medicine Physician · NPI 1184146078

William Matthew Walker, DO is a Hospitalist in Evansville, Indiana. Graduated from University of Pikeville, Kentucky College of Osteopathic Med in 2016, 10 years ago. Practices with Deaconess Hospital, Inc, a 414-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
10
Trained at
University of Pikeville, Kentucky College of Osteopathic Med
Licensed in
IN
In the registry since
2017
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

600 Mary St
Evansville, IN 47747-0001
Phone: (812) 450-3036
Fax: (812) 450-2193
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 02005727A (IN)
Family Medicine Physician Taxonomy 207Q00000X · Licence 02005727A (IN)

Record details

NPI number1184146078
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 12, 2017
Last updated in NPPESSeptember 16, 2019

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesFAMILY PRACTICE
Medical schoolUNIVERSITY OF PIKEVILLE, KENTUCKY COLLEGE OF OSTEOPATHIC MED
Graduated 2016 (10 years in practice)
Group practice Deaconess Hospital, Inc. — 414 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients274
Services billed 982 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 $20 1 payment · 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 Deaconess Hospital, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 414 clinicians in the practice; 12 are shown here.

Other providers in Evansville