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

Dennis W Prohaska, DO

Individual provider Physician Assistant · NPI 1689651010

Dennis W Prohaska, DO practises Diagnostic Radiology in Chicago, Illinois. Graduated from Chicago College of Osteopathy in 2010, 16 years ago. Practices with Premier Radiology Wisconsin LLC, a 111-clinician group and accepts Medicare assignment. Licensed in Illinois, Indiana and Wisconsin.

Years since qualifying
16
Trained at
Chicago College of Osteopathy
Licensed in
IL, IN, WI
In the registry since
2005
Specialties on file
4
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.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1516 S Wabash Ave Apt 1104
Chicago, IL 60605-2903
Phone: (414) 870-5178
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 02004880B (IN)
Physician Assistant Taxonomy 363A00000X · Licence 1610-023 (WI)
Physician Assistant Taxonomy 363A00000X · Licence 085-002276 (IL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 085-002276 (IL)

Record details

NPI number1689651010
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedDecember 28, 2005
Last updated in NPPESSeptember 29, 2026

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolCHICAGO COLLEGE OF OSTEOPATHY
Graduated 2010 (16 years in practice)
Group practice Premier Radiology Wisconsin Llc — 111 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations9 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 patients1,198
Services billed 1,659 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 $314 5 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 Premier Radiology Wisconsin LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 111 clinicians in the practice; 12 are shown here.

Other providers in Chicago