Skip to navigation Skip to Content
Join a world-class health system. Find Jobs
“I’m just an internist who loves helping patients and takes the best care of them that I can.”

Wausau Center

2727 Plaza Drive
Wausau, WI 54401

Appointment Phone:
1-715-847-3251

Provider Bio down arrow

“I wanted to be a doctor ever since the 9th grade,” says Dr. Schaller. “I took a day tour of a medical school, and the internist was the smartest doctor in the room – he always looked at a complete picture of the patient, and he could talk with any specialist and speak their language. That’s what I do.”

“A lot of my work involves managing diabetes, high cholesterol and other things associated with the natural aging process,” he explains. “Sometimes they happen at the same time, so having a physician who can coordinate care – knowing your preferences, tendencies, past history and family history – improves your care.”

Dr. Schaller and his wife, Blythe, a former social worker, live on an 11-acre property just west of Wausau. He stays active running, swimming, cycling and skiing. He’s skied the Birkebeiner and has competed in the Wausau Triathlon every year for over 20 years.

Dr. Schaller completed medical school at the University of Wisconsin School of Medicine and Public Health, in Madison. He completed an internship and a residency, both in internal medicine, at Maricopa Integrated Health System – Maricopa Medical Center, in Phoenix, Arizona. He is board-certified in internal medicine.

Professional Summary down arrow

  • Medical School
    University of Wisconsin School of Medicine & Public Health Madison, WI, United States, M.D. 1980

    Internship
    Maricopa Intregrated Health System - Marciopa Medical Center Phoenix, AZ, United States, Internal Medicine 1981

    Residency
    Maricopa Intregrated Health System - Marciopa Medical Center Phoenix, AZ, United States, Internal Medicine 1983

  • Professional Societies
    Wisconsin Medical Society

    Board Certifications
    Internal Medicine: 1983

    State Licenses
    Illinois Wisconsin

    Make a patient referral

Patient Ratings down arrow

4.8
out of 5 (133 ratings, 9 comments)
4.9
Provider friendliness
4.8
Provider explanations of my problem
4.8
Provider concern for my questions
4.8
Provider's efforts to include me in treatment decisions
4.7
Provider's medication information
4.8
Provider's follow-up care instructions
4.9
Provider's use of words I understood
4.7
Provider's amount of time with me
4.9
My confidence in this provider
4.9
My likelihood of recommending this provider

Patient Comments down arrow

Comments are also gathered from the Press Ganey patient satisfaction survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing.
Sort by:
February 05, 2018
The changes we are making were the result of open communication which I very much appreciate with Dr. Ivan Schaller.
February 05, 2018
Dr. Schaller is an excellent internist - he is available by phone & email & answers are given in a very good turn-around time.
February 19, 2018
excellent Doctor, Highly recommend
February 28, 2018
Dr. Schaller has been my physician for years and is always there for me & most important listens to my suggestions & welcomes my impute -
March 07, 2018
Dr. Schaller coordinates all my health care providers so I get the best results.
March 11, 2018
There is non better than my Dr. Ivan. He keeps a watch poll eye non current issue.
March 11, 2018
Dr. Schaller is an excellent doctor! He is kind, a good communicator, easy to understand, and listens very very well!
March 31, 2018
Very good.
March 02, 2018
Ivan Schaller is top notch in every way. So glad to have had him for our family doctor for many years.
March 02, 2018
Ivan Schaller is top notch in every way. So glad to have had him for our family doctor for many years.
February 05, 2018
The changes we are making were the result of open communication which I very much appreciate with Dr. Ivan Schaller.
February 05, 2018
Dr. Schaller is an excellent internist - he is available by phone & email & answers are given in a very good turn-around time.
February 19, 2018
excellent Doctor, Highly recommend
February 28, 2018
Dr. Schaller has been my physician for years and is always there for me & most important listens to my suggestions & welcomes my impute -
March 07, 2018
Dr. Schaller coordinates all my health care providers so I get the best results.
March 11, 2018
There is non better than my Dr. Ivan. He keeps a watch poll eye non current issue.
March 11, 2018
Dr. Schaller is an excellent doctor! He is kind, a good communicator, easy to understand, and listens very very well!
March 31, 2018
Very good.
February 05, 2018
The changes we are making were the result of open communication which I very much appreciate with Dr. Ivan Schaller.
February 05, 2018
Dr. Schaller is an excellent internist - he is available by phone & email & answers are given in a very good turn-around time.
February 19, 2018
excellent Doctor, Highly recommend
February 28, 2018
Dr. Schaller has been my physician for years and is always there for me & most important listens to my suggestions & welcomes my impute -
March 02, 2018
Ivan Schaller is top notch in every way. So glad to have had him for our family doctor for many years.
March 07, 2018
Dr. Schaller coordinates all my health care providers so I get the best results.
March 11, 2018
There is non better than my Dr. Ivan. He keeps a watch poll eye non current issue.
March 11, 2018
Dr. Schaller is an excellent doctor! He is kind, a good communicator, easy to understand, and listens very very well!
March 31, 2018
Very good.
March 31, 2018
Very good.
March 11, 2018
There is non better than my Dr. Ivan. He keeps a watch poll eye non current issue.
March 11, 2018
Dr. Schaller is an excellent doctor! He is kind, a good communicator, easy to understand, and listens very very well!
March 07, 2018
Dr. Schaller coordinates all my health care providers so I get the best results.
March 02, 2018
Ivan Schaller is top notch in every way. So glad to have had him for our family doctor for many years.
February 28, 2018
Dr. Schaller has been my physician for years and is always there for me & most important listens to my suggestions & welcomes my impute -
February 19, 2018
excellent Doctor, Highly recommend
February 05, 2018
The changes we are making were the result of open communication which I very much appreciate with Dr. Ivan Schaller.
February 05, 2018
Dr. Schaller is an excellent internist - he is available by phone & email & answers are given in a very good turn-around time.

Honor a Shining Star

Honor a provider or care team member who makes a difference in your care with a gift through the Shining Start program.