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

Individual provider Emergency Medicine Physician · NPI 1013953561

Darren M Heesacker, MD practises Emergency Medicine in Oshkosh, Wisconsin. Graduated from Medical College of Wisconsin in 1992, 34 years ago. Practices with Baycare Aurora LLC, a 199-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
34
Trained at
Medical College of Wisconsin
Licensed in
WI
In the registry since
2006
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

855 N Westhaven Dr
Oshkosh, WI 54904-7668
Phone: (920) 288-4060
Fax: (920) 456-7421
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 36486 (WI)

Record details

NPI number1013953561
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 22, 2006
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1992 (34 years in practice)
Group practice Baycare Aurora Llc — 199 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients307
Services billed 361 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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. Those with a page here are linked.

  • Aurora Medical Center Bay Area Hospital · Marinette, WI · listed as Aurora Medical Center Bay Area, Inc
  • Aurora Medical Ctr Oshkosh Hospital · Oshkosh, WI · listed as Aurora Medical Center of Oshkosh, Inc
  • Aurora Baycare Medical Ctr Hospital · Green Bay, WI
  • Aurora Medical Ctr Manitowoc County Hospital · Two Rivers, WI

Colleagues at Baycare Aurora LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 199 clinicians in the practice; 12 are shown here.

Other providers in Oshkosh