Mark Grossklaus, MD

Family medicine
Patient Rating
4.9 / 5 (Based on 200 reviews)
Not currently accepting new patients Insurance accepted

Mark Grossklaus

About me

Philosophy of care

“I enjoy caring for individuals of all ages, which provides the opportunity to treat entire families. I like the challenge of pursuing a diagnosis and identifying a course of treatment to help my patients feel better.”



Hobbies and Personal Interests

Dr. Grossklaus is married with three children and a dog. He enjoys spending time outdoors, biking and fishing. Dr. Grossklaus regularly competes in biathlons and annually in the American Birkebeiner’s signature ski race in Hayward, Wisconsin. He is also a professional driving education instructor at Road America.

My location

Medical education


University of Wisconsin School of Medicine and Public Health, Madison, WI


Mayo Clinic-Franciscan Healthcare, St. Francis Medical Center, La Crosse, WI


Board Certifications

Family Medicine


July 5, 2021
Dr. Grossklaus is by far the best doctor I have ever had.
June 28, 2021
Dt. Grossklaus is highly respected by my family. He is knowledgeable, respectful, and spot on with his treatment plans.
June 8, 2021
Dr. G had been my primary for nearly 15 years. I hope he doesn't retire before I die. Best care ever. Always attentive.
June 7, 2021
I was seen for a non-emergent visit. The visit was handled appropriately for the symptoms I was experiencing.
June 7, 2021
Dr. Grossklaus provides superior health care. He is courteous, knowledgeable and up to date regarding my specific circumstance.
June 4, 2021
The doctor was very polite but it wasn't my regular doctor. He seemed some what inexperienced compared to my regular doctor. In retrospect I wish I would have waited for my regular doctor until she had an opening.
June 2, 2021
With being on AARP, Medicare, ADU a wellness check my no longer include some items.
June 2, 2021
I would have needed more information on problem/diagnosis.
May 24, 2021
Dr. Grossklaus is great. Very attentive and helpful, takes time to fully explain things.
May 14, 2021
Due to an emergency medical condition that required a trip to the emergency room one week prior to my already scheduled appointment, my scheduled appointment became about the emergency room follow up. Because of this, we did not address the reason for the original scheduling. This is NOT a complaint. Rather, I was happy and impressed that the doctor was able to change from what he was expecting to do, to what needed to be done in the new more urgent situation.
May 10, 2021
If I would have had Dr. Grossklaus as my doctor earlier in my life , I would not have ended up with diabetes.
May 5, 2021
Have always been treated very well here for the last about 25 years
May 3, 2021
I have always experienced a very professional and friendly staff at this office -
April 9, 2021
All questions were answered.
April 7, 2021
Dr. Grossklaus has been my PCP for 20 yrs. Great dr. always listens knows me better than I know myself!
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