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

David D. Nelsen, MD

Individual provider Dermatology Physician · NPI 1417184169

David D. Nelsen, MD is a Dermatology in Janesville, Wisconsin. Graduated from University of Minnesota Medical School in 2009, 17 years ago. Practices with Mercy Health System Corporation, a 751-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
17
Trained at
University of Minnesota Medical School
Licensed in
WI
In the registry since
2009
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

3524 E Milwaukee St
Janesville, WI 53546-1626
Phone: (608) 756-7217
Fax: (608) 756-4700
Show map & directions

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

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 54912-20 (WI)

Record details

NPI number1417184169
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 19, 2009
Last updated in NPPESSeptember 12, 2018

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolUNIVERSITY OF MINNESOTA MEDICAL SCHOOL
Graduated 2009 (17 years in practice)
Group practice Mercy Health System Corporation — 751 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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