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“When you uncover something before it becomes serious and get it handled, that’s my thrill.”

Provider Bio down arrow

When he was still in medical school, Marshfield native Bart Isaacson took advantage of his summer breaks to shadow Marshfield Clinic Health System internists. “I really respected what they did,” Dr. Isaacson said. “So, as I continued my education, I decided that was the career I wanted – to be a specialist in providing primary care for adults.”

As an internist, Dr. Isaacson treats patients as illnesses and injuries occur, but he prefers managing issues before they become severe. “Prevention and early detection and treatment are important,” he said. “Helping a patient identify and modify risk factors reduces problems down the road.”

Dr. Isaacson completed medical school at the Medical College of Wisconsin in Milwaukee and a residency in internal medicine at Ohio State University Medical Center in Columbus, Ohio. He is board-certified in internal medicine.

Dr. Isaacson has been in practice since 1998. He had recently moved to the Weston area just before Marshfield Clinic Weston Center opened and became an inaugural member of the staff. He, his wife and four sons live along the Eau Claire River where they enjoy hiking, swimming and other outdoor activities. His wife runs Johanna May’s Fine Teas, a local tea house.

Professional Summary down arrow

  • Medical School
    Medical College of Wisconsin Milwaukee, WI, United States, M.D. 1995

    Residency
    Ohio State University - Medical Center Columbus, OH, United States, Internal Medicine 1998

  • Professional Societies
    American College of Physicians American Medical Association

    State Licenses
    Wisconsin

    NPI
    1689786824

Patient Ratings down arrow

4.9
out of 5 (301 ratings, 57 comments)
4.9
Provider explanations of my problem
4.9
Provider concern for my questions
4.9
Provider's efforts to include me in treatment decisions
4.9
Provider's discussion of proposed treatment
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.
Comments are from Press Ganey surveys. Slander, libel and private health information are removed.
Sort by:
December 3, 2023
Best Docter I ever had
December 4, 2023
Excels in every aspect of medical services & advice.
December 14, 2023
Dr. Isaacson is the best!
December 21, 2023
DR. ISAACSON IS EXCELLENT!
December 21, 2023
Dr. Isaacson is a true professional, caring individual and very knowledgeable.
December 21, 2023
Best doctor I have EVER had!!
December 31, 2023
Dr. Isaacson is an Excellent Doctor with superb knowledge and insight that is very highly Valued in Every aspect of personal Care and Wisdom,, Thank You for Years of Professional Care for me and My Family
January 12, 2024
Very good
January 15, 2024
Dr. Isaacson is the BEST Doctor EVER!!!!
January 16, 2024
All good.
January 17, 2024
I have been a patient of Dr. Isaacson's since 2002. He is by far the BEST physician that has ever treated me or a family member!!
January 19, 2024
Very knowledgeable and likable Dr.
January 24, 2024
Dr. Isaacson is a wonderful physician. Treats you like a person and not just a number. He is awesome.
February 6, 2024
COULD NOT ask for a better care provider. #1. Would give a 10 if I could.
February 28, 2024
All good.
February 28, 2024
Dr. Isaacson has been my personal doctor for 26 years. He is always very informative, caring and professional. I would recommend him to anybody.
March 8, 2024
Dr I is amazing; very empathic, great ideas for possible help with my issues. Very honest about options.A great doctor
March 15, 2024
Answers all concerns & questions.
March 20, 2024
Dr. Isaacson is a caring doctor that listens to his patients. Highly recommend!
March 22, 2024
Dr. Isaacson is wonderful. Very personable. Very knowledgeable. He made my exam a good experience. I would highly recommend Dr. Isaacson to others.
March 30, 2024
Dr Isaacson is a great PCP and is highly regarded in the local medical community.
April 16, 2024
Doctor Isaacson did a wonderful job of checking me over, and discussing what my issue might be. I never had sinus infection before, so it was helpful for him to suggest that as the problem, and provide options for how to treat it.
April 18, 2024
Always good.
April 19, 2024
Always receive the BEST care from Dr. Isaacson.
April 20, 2024
Dr Isaacson and his staff are excellent and caring
April 24, 2024
Doctor showed a genuine interest in my care and was easy to talk to.
April 25, 2024
Dr. Isaacson is completely aware of all my wishes and all his treatments coincide with my conditions and needs.
April 30, 2024
Excellent, caring physician (Dr. Issaccson)
April 30, 2024
Good
June 7, 2024
Dr. Isaacson is such an asset to the Clinic. He's a great listener, critical thinker, and problem solver. He genuinely cares about his patients, and remembers all family members & asks about them by name. That means a lot.
June 10, 2024
Excellent care. Dr Isaacson is great.
June 12, 2024
Dr Isaacson has been my primary care doctor for more than 15 years. We have a good doctor / patient relationship. He is very competent and professional. We continue to address my concerns and I feel my health is in a good place.
June 19, 2024
He is very patient, a good educator and the best! He went through all my lab tests and answered all my questions!
June 20, 2024
Dr. Issacson is always a professional, knowledgeable and caring. He is an asset for the Marshfield Health Care System.
June 22, 2024
I had mentioned to my family when I first became a patient of Dr. Isaacson's that I was happy to have been allowed in as a patient of his. My daughter & husband have since became patients of his.
June 28, 2024
Dr. Isaacson is an excellent physician - professional, caring, informative, everything good in Internal Meds! THE BEST!!! Too bad we can't clone him.
July 22, 2024
Dr Isaacson is always attentive and discusses various options and reasons why to choose one.
July 22, 2024
Dr. I. is fantastic. I could not imagine going to anyone else!
July 24, 2024
Dr. Isaacson is an excellent doctor and very nice person!!
July 30, 2024
Dr. Isaacson is a very good Dr. he makes me feel comfortable and important.
August 12, 2024
Excellent. Listened. Respectful and made sure I understood and mutually agreed upon direction we were going. Spoke in ways I understood and felt empowered in the best use of our time.
August 19, 2024
Doctor Isaacson is an excellent physician and a very caring man. He always makes things clear and understandable.
August 20, 2024
...very pleased with his attention to & explanation listened.
September 6, 2024
He is very attentive, personable and takes his time to really listen to his patients
September 9, 2024
My Doctor is always concerned with my health & to help me stay healthy
September 12, 2024
Dr. Isaacson has always been a great doctor.
September 19, 2024
Dr. Isaacson is very compassionate and caring when working with me. He listens and is thorough when examining. I appreciate him taking time to make sure I am okay both physically and mentally. He is like a part of my family.
September 19, 2024
Have been seeing Dr. Isaacson for years. He's kind, caring, empathetic, and extremely knowledgeable. He treats you like family-always remembers other family members & what's going on in your life. ...
October 11, 2024
Great, through,and interested in my health
October 15, 2024
Great
October 18, 2024
Dr. Isaacson is very pleasant, concerned and provides info related to issues and treatment. Disease process are explained.
November 1, 2024
Good
November 12, 2024
Best Doctor ever.
November 19, 2024
Dr. Bart is a wonderful dr. He explains things so I can understand the risk's & benefits. I feel he is understanding my issues.
February 27, 2024
I am so pleased with Dr. Isaacson. He really does seem to care and tries to take as much time as possible.
May 15, 2024
Bart is a very good doctor.
September 20, 2024
Dr Isaacson is willing to work with me on my plan for diet and getting off meds.
September 20, 2024
Dr Isaacson is willing to work with me on my plan for diet and getting off meds.
May 15, 2024
Bart is a very good doctor.
February 27, 2024
I am so pleased with Dr. Isaacson. He really does seem to care and tries to take as much time as possible.
December 3, 2023
Best Docter I ever had
December 4, 2023
Excels in every aspect of medical services & advice.
December 14, 2023
Dr. Isaacson is the best!
December 21, 2023
DR. ISAACSON IS EXCELLENT!
December 21, 2023
Dr. Isaacson is a true professional, caring individual and very knowledgeable.
December 21, 2023
Best doctor I have EVER had!!
December 31, 2023
Dr. Isaacson is an Excellent Doctor with superb knowledge and insight that is very highly Valued in Every aspect of personal Care and Wisdom,, Thank You for Years of Professional Care for me and My Family
January 12, 2024
Very good
January 15, 2024
Dr. Isaacson is the BEST Doctor EVER!!!!
January 16, 2024
All good.
January 17, 2024
I have been a patient of Dr. Isaacson's since 2002. He is by far the BEST physician that has ever treated me or a family member!!
January 19, 2024
Very knowledgeable and likable Dr.
January 24, 2024
Dr. Isaacson is a wonderful physician. Treats you like a person and not just a number. He is awesome.
February 6, 2024
COULD NOT ask for a better care provider. #1. Would give a 10 if I could.
February 28, 2024
All good.
February 28, 2024
Dr. Isaacson has been my personal doctor for 26 years. He is always very informative, caring and professional. I would recommend him to anybody.
March 8, 2024
Dr I is amazing; very empathic, great ideas for possible help with my issues. Very honest about options.A great doctor
March 15, 2024
Answers all concerns & questions.
March 20, 2024
Dr. Isaacson is a caring doctor that listens to his patients. Highly recommend!
March 22, 2024
Dr. Isaacson is wonderful. Very personable. Very knowledgeable. He made my exam a good experience. I would highly recommend Dr. Isaacson to others.
March 30, 2024
Dr Isaacson is a great PCP and is highly regarded in the local medical community.
April 16, 2024
Doctor Isaacson did a wonderful job of checking me over, and discussing what my issue might be. I never had sinus infection before, so it was helpful for him to suggest that as the problem, and provide options for how to treat it.
April 18, 2024
Always good.
April 19, 2024
Always receive the BEST care from Dr. Isaacson.
April 20, 2024
Dr Isaacson and his staff are excellent and caring
April 24, 2024
Doctor showed a genuine interest in my care and was easy to talk to.
April 25, 2024
Dr. Isaacson is completely aware of all my wishes and all his treatments coincide with my conditions and needs.
April 30, 2024
Excellent, caring physician (Dr. Issaccson)
April 30, 2024
Good
June 7, 2024
Dr. Isaacson is such an asset to the Clinic. He's a great listener, critical thinker, and problem solver. He genuinely cares about his patients, and remembers all family members & asks about them by name. That means a lot.
June 10, 2024
Excellent care. Dr Isaacson is great.
June 12, 2024
Dr Isaacson has been my primary care doctor for more than 15 years. We have a good doctor / patient relationship. He is very competent and professional. We continue to address my concerns and I feel my health is in a good place.
June 19, 2024
He is very patient, a good educator and the best! He went through all my lab tests and answered all my questions!
June 20, 2024
Dr. Issacson is always a professional, knowledgeable and caring. He is an asset for the Marshfield Health Care System.
June 22, 2024
I had mentioned to my family when I first became a patient of Dr. Isaacson's that I was happy to have been allowed in as a patient of his. My daughter & husband have since became patients of his.
June 28, 2024
Dr. Isaacson is an excellent physician - professional, caring, informative, everything good in Internal Meds! THE BEST!!! Too bad we can't clone him.
July 22, 2024
Dr Isaacson is always attentive and discusses various options and reasons why to choose one.
July 22, 2024
Dr. I. is fantastic. I could not imagine going to anyone else!
July 24, 2024
Dr. Isaacson is an excellent doctor and very nice person!!
July 30, 2024
Dr. Isaacson is a very good Dr. he makes me feel comfortable and important.
August 12, 2024
Excellent. Listened. Respectful and made sure I understood and mutually agreed upon direction we were going. Spoke in ways I understood and felt empowered in the best use of our time.
August 19, 2024
Doctor Isaacson is an excellent physician and a very caring man. He always makes things clear and understandable.
August 20, 2024
...very pleased with his attention to & explanation listened.
September 6, 2024
He is very attentive, personable and takes his time to really listen to his patients
September 9, 2024
My Doctor is always concerned with my health & to help me stay healthy
September 12, 2024
Dr. Isaacson has always been a great doctor.
September 19, 2024
Dr. Isaacson is very compassionate and caring when working with me. He listens and is thorough when examining. I appreciate him taking time to make sure I am okay both physically and mentally. He is like a part of my family.
September 19, 2024
Have been seeing Dr. Isaacson for years. He's kind, caring, empathetic, and extremely knowledgeable. He treats you like family-always remembers other family members & what's going on in your life. ...
October 11, 2024
Great, through,and interested in my health
October 15, 2024
Great
October 18, 2024
Dr. Isaacson is very pleasant, concerned and provides info related to issues and treatment. Disease process are explained.
November 1, 2024
Good
November 12, 2024
Best Doctor ever.
November 19, 2024
Dr. Bart is a wonderful dr. He explains things so I can understand the risk's & benefits. I feel he is understanding my issues.
December 3, 2023
Best Docter I ever had
December 4, 2023
Excels in every aspect of medical services & advice.
December 14, 2023
Dr. Isaacson is the best!
December 21, 2023
DR. ISAACSON IS EXCELLENT!
December 21, 2023
Dr. Isaacson is a true professional, caring individual and very knowledgeable.
December 21, 2023
Best doctor I have EVER had!!
December 31, 2023
Dr. Isaacson is an Excellent Doctor with superb knowledge and insight that is very highly Valued in Every aspect of personal Care and Wisdom,, Thank You for Years of Professional Care for me and My Family
January 12, 2024
Very good
January 15, 2024
Dr. Isaacson is the BEST Doctor EVER!!!!
January 16, 2024
All good.
January 17, 2024
I have been a patient of Dr. Isaacson's since 2002. He is by far the BEST physician that has ever treated me or a family member!!
January 19, 2024
Very knowledgeable and likable Dr.
January 24, 2024
Dr. Isaacson is a wonderful physician. Treats you like a person and not just a number. He is awesome.
February 6, 2024
COULD NOT ask for a better care provider. #1. Would give a 10 if I could.
February 27, 2024
I am so pleased with Dr. Isaacson. He really does seem to care and tries to take as much time as possible.
February 28, 2024
All good.
February 28, 2024
Dr. Isaacson has been my personal doctor for 26 years. He is always very informative, caring and professional. I would recommend him to anybody.
March 8, 2024
Dr I is amazing; very empathic, great ideas for possible help with my issues. Very honest about options.A great doctor
March 15, 2024
Answers all concerns & questions.
March 20, 2024
Dr. Isaacson is a caring doctor that listens to his patients. Highly recommend!
March 22, 2024
Dr. Isaacson is wonderful. Very personable. Very knowledgeable. He made my exam a good experience. I would highly recommend Dr. Isaacson to others.
March 30, 2024
Dr Isaacson is a great PCP and is highly regarded in the local medical community.
April 16, 2024
Doctor Isaacson did a wonderful job of checking me over, and discussing what my issue might be. I never had sinus infection before, so it was helpful for him to suggest that as the problem, and provide options for how to treat it.
April 18, 2024
Always good.
April 19, 2024
Always receive the BEST care from Dr. Isaacson.
April 20, 2024
Dr Isaacson and his staff are excellent and caring
April 24, 2024
Doctor showed a genuine interest in my care and was easy to talk to.
April 25, 2024
Dr. Isaacson is completely aware of all my wishes and all his treatments coincide with my conditions and needs.
April 30, 2024
Excellent, caring physician (Dr. Issaccson)
April 30, 2024
Good
May 15, 2024
Bart is a very good doctor.
June 7, 2024
Dr. Isaacson is such an asset to the Clinic. He's a great listener, critical thinker, and problem solver. He genuinely cares about his patients, and remembers all family members & asks about them by name. That means a lot.
June 10, 2024
Excellent care. Dr Isaacson is great.
June 12, 2024
Dr Isaacson has been my primary care doctor for more than 15 years. We have a good doctor / patient relationship. He is very competent and professional. We continue to address my concerns and I feel my health is in a good place.
June 19, 2024
He is very patient, a good educator and the best! He went through all my lab tests and answered all my questions!
June 20, 2024
Dr. Issacson is always a professional, knowledgeable and caring. He is an asset for the Marshfield Health Care System.
June 22, 2024
I had mentioned to my family when I first became a patient of Dr. Isaacson's that I was happy to have been allowed in as a patient of his. My daughter & husband have since became patients of his.
June 28, 2024
Dr. Isaacson is an excellent physician - professional, caring, informative, everything good in Internal Meds! THE BEST!!! Too bad we can't clone him.
July 22, 2024
Dr Isaacson is always attentive and discusses various options and reasons why to choose one.
July 22, 2024
Dr. I. is fantastic. I could not imagine going to anyone else!
July 24, 2024
Dr. Isaacson is an excellent doctor and very nice person!!
July 30, 2024
Dr. Isaacson is a very good Dr. he makes me feel comfortable and important.
August 12, 2024
Excellent. Listened. Respectful and made sure I understood and mutually agreed upon direction we were going. Spoke in ways I understood and felt empowered in the best use of our time.
August 19, 2024
Doctor Isaacson is an excellent physician and a very caring man. He always makes things clear and understandable.
August 20, 2024
...very pleased with his attention to & explanation listened.
September 6, 2024
He is very attentive, personable and takes his time to really listen to his patients
September 9, 2024
My Doctor is always concerned with my health & to help me stay healthy
September 12, 2024
Dr. Isaacson has always been a great doctor.
September 19, 2024
Dr. Isaacson is very compassionate and caring when working with me. He listens and is thorough when examining. I appreciate him taking time to make sure I am okay both physically and mentally. He is like a part of my family.
September 19, 2024
Have been seeing Dr. Isaacson for years. He's kind, caring, empathetic, and extremely knowledgeable. He treats you like family-always remembers other family members & what's going on in your life. ...
September 20, 2024
Dr Isaacson is willing to work with me on my plan for diet and getting off meds.
October 11, 2024
Great, through,and interested in my health
October 15, 2024
Great
October 18, 2024
Dr. Isaacson is very pleasant, concerned and provides info related to issues and treatment. Disease process are explained.
November 1, 2024
Good
November 12, 2024
Best Doctor ever.
November 19, 2024
Dr. Bart is a wonderful dr. He explains things so I can understand the risk's & benefits. I feel he is understanding my issues.
November 19, 2024
Dr. Bart is a wonderful dr. He explains things so I can understand the risk's & benefits. I feel he is understanding my issues.
November 12, 2024
Best Doctor ever.
November 1, 2024
Good
October 18, 2024
Dr. Isaacson is very pleasant, concerned and provides info related to issues and treatment. Disease process are explained.
October 15, 2024
Great
October 11, 2024
Great, through,and interested in my health
September 20, 2024
Dr Isaacson is willing to work with me on my plan for diet and getting off meds.
September 19, 2024
Dr. Isaacson is very compassionate and caring when working with me. He listens and is thorough when examining. I appreciate him taking time to make sure I am okay both physically and mentally. He is like a part of my family.
September 19, 2024
Have been seeing Dr. Isaacson for years. He's kind, caring, empathetic, and extremely knowledgeable. He treats you like family-always remembers other family members & what's going on in your life. ...
September 12, 2024
Dr. Isaacson has always been a great doctor.
September 9, 2024
My Doctor is always concerned with my health & to help me stay healthy
September 6, 2024
He is very attentive, personable and takes his time to really listen to his patients
August 20, 2024
...very pleased with his attention to & explanation listened.
August 19, 2024
Doctor Isaacson is an excellent physician and a very caring man. He always makes things clear and understandable.
August 12, 2024
Excellent. Listened. Respectful and made sure I understood and mutually agreed upon direction we were going. Spoke in ways I understood and felt empowered in the best use of our time.
July 30, 2024
Dr. Isaacson is a very good Dr. he makes me feel comfortable and important.
July 24, 2024
Dr. Isaacson is an excellent doctor and very nice person!!
July 22, 2024
Dr Isaacson is always attentive and discusses various options and reasons why to choose one.
July 22, 2024
Dr. I. is fantastic. I could not imagine going to anyone else!
June 28, 2024
Dr. Isaacson is an excellent physician - professional, caring, informative, everything good in Internal Meds! THE BEST!!! Too bad we can't clone him.
June 22, 2024
I had mentioned to my family when I first became a patient of Dr. Isaacson's that I was happy to have been allowed in as a patient of his. My daughter & husband have since became patients of his.
June 20, 2024
Dr. Issacson is always a professional, knowledgeable and caring. He is an asset for the Marshfield Health Care System.
June 19, 2024
He is very patient, a good educator and the best! He went through all my lab tests and answered all my questions!
June 12, 2024
Dr Isaacson has been my primary care doctor for more than 15 years. We have a good doctor / patient relationship. He is very competent and professional. We continue to address my concerns and I feel my health is in a good place.
June 10, 2024
Excellent care. Dr Isaacson is great.
June 7, 2024
Dr. Isaacson is such an asset to the Clinic. He's a great listener, critical thinker, and problem solver. He genuinely cares about his patients, and remembers all family members & asks about them by name. That means a lot.
May 15, 2024
Bart is a very good doctor.
April 30, 2024
Excellent, caring physician (Dr. Issaccson)
April 30, 2024
Good
April 25, 2024
Dr. Isaacson is completely aware of all my wishes and all his treatments coincide with my conditions and needs.
April 24, 2024
Doctor showed a genuine interest in my care and was easy to talk to.
April 20, 2024
Dr Isaacson and his staff are excellent and caring
April 19, 2024
Always receive the BEST care from Dr. Isaacson.
April 18, 2024
Always good.
April 16, 2024
Doctor Isaacson did a wonderful job of checking me over, and discussing what my issue might be. I never had sinus infection before, so it was helpful for him to suggest that as the problem, and provide options for how to treat it.
March 30, 2024
Dr Isaacson is a great PCP and is highly regarded in the local medical community.
March 22, 2024
Dr. Isaacson is wonderful. Very personable. Very knowledgeable. He made my exam a good experience. I would highly recommend Dr. Isaacson to others.
March 20, 2024
Dr. Isaacson is a caring doctor that listens to his patients. Highly recommend!
March 15, 2024
Answers all concerns & questions.
March 8, 2024
Dr I is amazing; very empathic, great ideas for possible help with my issues. Very honest about options.A great doctor
February 28, 2024
All good.
February 28, 2024
Dr. Isaacson has been my personal doctor for 26 years. He is always very informative, caring and professional. I would recommend him to anybody.
February 27, 2024
I am so pleased with Dr. Isaacson. He really does seem to care and tries to take as much time as possible.
February 6, 2024
COULD NOT ask for a better care provider. #1. Would give a 10 if I could.
January 24, 2024
Dr. Isaacson is a wonderful physician. Treats you like a person and not just a number. He is awesome.
January 19, 2024
Very knowledgeable and likable Dr.
January 17, 2024
I have been a patient of Dr. Isaacson's since 2002. He is by far the BEST physician that has ever treated me or a family member!!
January 16, 2024
All good.
January 15, 2024
Dr. Isaacson is the BEST Doctor EVER!!!!
January 12, 2024
Very good
December 31, 2023
Dr. Isaacson is an Excellent Doctor with superb knowledge and insight that is very highly Valued in Every aspect of personal Care and Wisdom,, Thank You for Years of Professional Care for me and My Family
December 21, 2023
DR. ISAACSON IS EXCELLENT!
December 21, 2023
Dr. Isaacson is a true professional, caring individual and very knowledgeable.
December 21, 2023
Best doctor I have EVER had!!
December 14, 2023
Dr. Isaacson is the best!
December 4, 2023
Excels in every aspect of medical services & advice.
December 3, 2023
Best Docter I ever had

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