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

Dr. Benjamin Joseph Heinzen, MD

Individual provider Internal Medicine Physician · NPI 1083886733

Dr. Benjamin Joseph Heinzen, MD is an Internal Medicine in Oshkosh, Wisconsin. Graduated from University of Wisconsin School of Medicine in 2008, 18 years ago. Practices with Ascension Medical Group-Fox Valley Wisconsin, Inc, a 260-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
18
Trained at
University of Wisconsin School of Medicine
Licensed in
WI
In the registry since
2008
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

1855 S Koeller St
Oshkosh, WI 54902-6214
Phone: (920) 223-7100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 55367-020 (WI)

Record details

NPI number1083886733
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 1, 2008
Last updated in NPPESSeptember 16, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Ascension Medical Group-Fox Valley Wisconsin, Inc — 260 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations10 on file with Medicare

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