Highlights
Age Groups Seen
- Child 2-12
- Adult 21-65
- Older Adult >65
Languages
- English
Gender
MaleVideo
Locations
- Onalaska - Allergy
- 3111 Gundersen Drive, Onalaska, WI 54650
- Get Directions
- phone: 608-775-3400
- Winona - Outpatient Services
- 1122 West Highway 61, Winona, MN 55987
- Get Directions
- phone: 507-615-0600
- Decorah - Pediatric Specialty
- 1830 State Highway 9, Decorah, IA 52101
- Get Directions
- phone: 563-387-5500
Expertise
Education
Northwestern University, Feinberg School of Medicine
Fellowship, Pediatric Allergy/Asthma/Immunology, 1989Gundersen Medical Foundation
Residency, Pediatric, 1987University Of Wisconsin School Of Medicine And Pub
Medical School, 1984Board Certifications
Allergy and Immunology
American Board of Allergy and Immunology, 1989Insurance
- Aetna Health Management
- Amerigroup Iowa Inc
- Anthem BCBS WI
- Arise Health Plan/ WPS
- BCBS MN
- Benefit Plan Administrators
- Care Wisconsin
- CIGNA
- Community Link
- Group Health Cooperative of Eau Claire
- HealthEOS by Multiplan
- Healthpartners, Inc
- Humana,Inc
- Independent Care Health Plan Medicaid
- Medica IFB
- Meritain Health
- MHS Health
- Midlands Choice
- Preferred One
- Quartz
- The Alliance
- Tricare East
- Tricare West
- Ucare Minnesota
- United Healthcare Inc.
- WCA Group Health Trust
- Wellmark BCBS IA
- Wisconsin Education Association
- Wisconsin Physician Services
Ratings & Reviews
4.9 out of 5
48 ratings, 22 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- 5 out of 5 starsReviewed on 4/19/2025
I finally feel like I have answers to why my body decided to do what it was doing.
- 5 out of 5 starsReviewed on 4/5/2025
Dr. Mahr is a great doctor!
- 5 out of 5 starsReviewed on 1/31/2025
I have been blessed with Dr. Mahr's care for more than 30 years, and my health has benefited from his examinations, guidance, and advocacy. I am excited for his time of retirement, but selfish with thoughts of my health care being in someone else's hands.
- 5 out of 5 starsReviewed on 1/25/2025
Dr Mahr is a very compassionate and caring doctor! Very through!
- 5 out of 5 starsReviewed on 1/23/2025
great place and people
- 5 out of 5 starsReviewed on 1/23/2025
Dr Mahr was very helpful with asking many questions and getting the details of what I have been going through.
- 5 out of 5 starsReviewed on 1/21/2025
Everyone was friendly, personable, and professional. Liked they all listened to my concerns and didn't make me feel like I was unsure of what I had been experiencing with my child.
- 5 out of 5 starsReviewed on 1/10/2025
Excellent provider!
- 5 out of 5 starsReviewed on 11/5/2024
Dr Mahr is irreplaceable. You can not train his demeanor and care. I have had 3 children work with Dr Mahr and couldn't have imagined going down the road of Asthma and Allergy without him!!
- 5 out of 5 starsReviewed on 10/18/2024
My daughter was a patient of Dr. Mahr's when he was in pediatric specialties so I was thoroughly excited to see him as a patient myself. He is such a wonderful doctor!!!
- 5 out of 5 starsReviewed on 10/9/2024
Dr. Mahr does an exceptional job and has a wonderful personality with children.
- 5 out of 5 starsReviewed on 9/26/2024
Dr Mahr was absolutely incredible!
- 5 out of 5 starsReviewed on 9/20/2024
It's too bad Gundersen is short allergy doctors
- 5 out of 5 starsReviewed on 8/29/2024
Dr. Mahr was excellent. I think he is the most thorough doctor I have ever seen. And he was the nicest guy. I was so pleased when I left the office. I thought thank goodness I might see some relief soon. Because my issues have been going on for seven months. Just all around great appointment. His staff was excellent as well.
- 5 out of 5 starsReviewed on 8/3/2024
Dr. Mahr is amazing and we wish him nothing but the best on his next chapter!
- 5 out of 5 starsReviewed on 7/26/2024
Dr. Mahr will be missed! I pray that he is replaced by a doctor that is equally as competent, compassionate, caring and commitment as he!
- 5 out of 5 starsReviewed on 7/26/2024
We are extremely happy as always with doc mahr. Happy for him hes retiring but sad cause he's seriously the best!
- 5 out of 5 starsReviewed on 7/18/2024
Dr. Mahr is very thorough and answers every questions completely. I left feeling accomplished with a better understanding of my child's diagnosis.
- 5 out of 5 starsReviewed on 7/4/2024
As far as appointments go, a very pleasant check up. Dr MAHR and his nursing staff have always been the best.
- 5 out of 5 starsReviewed on 6/19/2024
Great personalized care.
- 5 out of 5 starsReviewed on 6/11/2024
We're gonna miss Dr. Mahr! But we know he'll leave us in good hands.
- 5 out of 5 starsReviewed on 6/11/2024
Dr Mahr is one of the best doctors my daughter has had, he goes above and beyond to make each child feel Unique!