Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Dennis Frederick Zagrodnik II, MD

Individual provider Surgery Physician · NPI 1538155569

Dr. Dennis Frederick Zagrodnik II, MD practises General Surgery in Summit, Wisconsin. Graduated from Medical College of Wisconsin in 1997, 29 years ago. Practices with Aurora Medical Group, Inc, a 3,741-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
29
Trained at
Medical College of Wisconsin
Licensed in
WI
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

36500 Aurora Dr
Summit, WI 53066-4899
Phone: (262) 434-5000
Fax: (262) 434-7250
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 49528-020 (WI)

Record details

NPI number1538155569
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 26, 2005
Last updated in NPPESJuly 2, 2024
Certification dateJuly 2, 2024

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Also practisesSURGICAL ONCOLOGY, THORACIC SURGERY, VASCULAR SURGERY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1997 (29 years in practice)
Group practice Aurora Medical Group, Inc. — 3741 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Varicose vein removal 41 times · 71st percentile
Colonoscopy 1–10 times
Hernia repair (minimally invasive) 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients202
Services billed 476 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Aurora Medical Group, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3741 clinicians in the practice; 12 are shown here.

Other providers in Summit