Home/Providers/Hematology and Oncology/Shannon O'Mahar

Shannon O'Mahar, MD

Hematology and Oncology • 2 Locations

4.9 out of 5 –

SSM Health Cancer Care

1211 Fish Hatchery Road Madison, WI 53715

Dr. O'Mahar is a board certified oncologist. She obtained her undergraduate degree from Stanford University and earned her medical degree from the Washington University School of Medicine in St. Louis. She completed her internship at Barnes-Jewish Hospital in St. Louis and her fellowship at the University of Wisconsin - Madison.

Her area of expertise is the treatment of multiple myeloma, myelodysplastic syndromes, monoclonal gammopathy, melanoma and acute and chronic leukemia.

In her free time, Dr. O'Mahar enjoys baking and writing sort stories and poetry.

About Me

Reviews

Rating Breakdown

Reviews are measured on a scale of 1 to 5, with 5 being the best score.

Question Breakdown
4.9
Overall Experience
4.9
Listened Carefully
4.9
Explained Things Clearly
4.9
Knew Medical History
4.9
Involved in Care Decisions
4.9
Showed Courtesy & Respect

Patient Reviews

SSM Health only displays patient satisfaction data for providers included in our survey process and who have a minimum of 30 returned surveys. The overall rating is an average of all responses to the survey questions listed below. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy. Learn more about our survey.

4.9 out of 5

148 ratings,

50 reviews

8/12/2026

she explained the pet scan i had in detail. decided i could wait a year to return.

8/11/2026

As previously mentioned she was very thorough, compassionate, and with her engaging personality it put me at ease. I would highly recommend her.

8/11/2026

Dr. O'mahar kindness and thorough explanation of lab results and answering my question tells me she really is concerned and cares on how I feel during my progression.

8/6/2026

From the moment I met her she has been knowledgeable, caring, listens to my concerns, makes things happen that are best for me and she is delightful.

8/5/2026

She is a very pleasant person.