Highlights
Age Groups Seen
- Adult 19-64
- Older Adult >65
Gender
MaleHospital Affiliation
- Holy Rosary Hospital
- St. Vincent Regional Hospital
Video
Locations
- Downtown Clinic - Nephrology
- 2900 12th Avenue North, Suite 400E, Billings, MT 59101
- Get Directions
- phone: 406-237-5770
- fax: 406-237-5768
- Cody Clinic - Nephrology Outreach
- 424 Yellowstone Avenue, Ste 310, Suite 310, Cody, WY 82414
- Get Directions
- phone: 406-237-5770
- fax: 406-237-5768
Expertise
Education
- Fellowship: Yale University School of Medicine, Nephrology, 1988
- Fellowship: Yale University School of Medicine, Nephrology, 1986
- Residency: University of Illinois at Chicago, Internal Medicine, 1985
- Medical School: Drexel University College of Medicine-Center City, 1982
Board Certifications
- Internal Medicine: American Board of Internal Medicine
- Nephrology: American Board of Internal Medicine, 1988
Insurance
- 6 Degrees Health
- Aetna
- Alignetworks
- Allegiance Provider Direct
- Americas Choice Provider Network
- Banner Health System
- BCBS
- Cigna
- City of Billings Employee Health Plan
- Community Health Network
- FedMed Network
- First Choice Health Network
- First Choice of the Midwest
- First Health/Coventry
- Fortified Provider Network
- Humana
- Humana Medicare Advantage
- Interwest
- Logistics Health Incorporated
- Montana Health Systems
- Mountain Health Co-op
- Pacific Steel & Recycling
- PacificSource
- Preferred One
- Sibanye Stillwater Health Partners
- Three Rivers Provider Network
- Tricare
- TriWest
- United Healthcare
- VA Montana Health System
Ratings & Reviews
5 out of 5
301 ratings, 43 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 2/19/2026
Dr Ganz is personable, a good listener, and a clear sharer of information.
- 5 out of 5 starsReviewed on 2/9/2026
Dr. Ganz is knowledgeable, helpful, listens, keeps up on latest news and uses extremely extensive experience plus book learning to help patients.
- 5 out of 5 starsReviewed on 2/7/2026
He is an excellent doctor and I hate to see him retire, but I wish him well.
- 5 out of 5 starsReviewed on 1/27/2026
He will be missed. If you were smart, you would talk him into staying longer. Pay him more!
- 5 out of 5 starsReviewed on 1/25/2026
Very well
- 5 out of 5 starsReviewed on 1/24/2026
I think he's a great doctor and he knows all his stuff
- 5 out of 5 starsReviewed on 1/20/2026
He is a very nice, caring doctor. Very easy to talk to and he listens.
- 5 out of 5 starsReviewed on 1/16/2026
We have great communication
- 5 out of 5 starsReviewed on 12/26/2025
Extremely Nice Doctor.
- 5 out of 5 starsReviewed on 12/25/2025
Excellent Doctor, when I am concerned, I receive Peace when I receive an explanation from him.
- 5 out of 5 starsReviewed on 12/20/2025
He cares
- 5 out of 5 starsReviewed on 12/19/2025
Dr Ganz has always been professional, knowledgeable and compassionate. He is always able to explain issues in layman's terms and shows interest in your wellbeing.
- 5 out of 5 starsReviewed on 12/13/2025
great person and support team
- 5 out of 5 starsReviewed on 12/12/2025
Veru kind, understanding and careing. Listened carefully and explained things in a way the layman understands.
- 5 out of 5 starsReviewed on 11/25/2025
He has my trust and rate him as the top doctor I met in 2025
- 5 out of 5 starsReviewed on 11/4/2025
A very good Dr. & very caring.
- 5 out of 5 starsReviewed on 11/3/2025
Dr. Ganz answered all of my questions.
- 5 out of 5 starsReviewed on 10/31/2025
dr. Ganz truly cares. He explains everything to me makes me feel at ease. I’m very thankful to have him as my doctor.
- 5 out of 5 starsReviewed on 10/26/2025
He is one of the most courteous knowledgeable and caring doctors I have dealt with with
- 5 out of 5 starsReviewed on 10/25/2025
Very wise ,,cares about his patients and great experience with them all
- 5 out of 5 starsReviewed on 10/2/2025
He is very capable. Has excellent rapport with his patient
- 5 out of 5 starsReviewed on 9/26/2025
Best doctor ever
- 5 out of 5 starsReviewed on 9/25/2025
Dr. Ganz is always helpful with any questions I may have and also very friendly!
- 5 out of 5 starsReviewed on 9/23/2025
Very good dr and wise ,, kind and helpful with my CKD
- 5 out of 5 starsReviewed on 8/22/2025
Dr Ganz helped me with a blood pressure problem other doctors were no able to.
- 5 out of 5 starsReviewed on 8/14/2025
He's a great doctor and cares for his patients and there needs.
- 5 out of 5 starsReviewed on 8/9/2025
Makes you feel at ease. Of all the doctors I've seen in my 74 years he is in the top two
- 5 out of 5 starsReviewed on 7/31/2025
Very nice
- 5 out of 5 starsReviewed on 7/31/2025
Like him
- 5 out of 5 starsReviewed on 7/31/2025
I enjoy Dr Ganz very much much! He’s the reason I keep coming back.
- 5 out of 5 starsReviewed on 7/28/2025
I wouldn't change a thing!!! Dr. Ganz is the best!!
- 5 out of 5 starsReviewed on 7/28/2025
Very knowledgeable and professional
- 5 out of 5 starsReviewed on 7/25/2025
I am extremely happy.
- 5 out of 5 starsReviewed on 7/18/2025
He is always on time, great personality, so very smart, caring, and he listens!
- 5 out of 5 starsReviewed on 7/11/2025
He listened.
- 5 out of 5 starsReviewed on 7/6/2025
Excellent doctor
- 5 out of 5 starsReviewed on 6/27/2025
Best kidney doctor in the state of Montana
- 5 out of 5 starsReviewed on 6/19/2025
He is gentle and caring
- 5 out of 5 starsReviewed on 6/5/2025
Great Doctor
- 5 out of 5 starsReviewed on 6/2/2025
A very knowledgeable and caring doctor
- 5 out of 5 starsReviewed on 5/1/2025
THE BEST
- 5 out of 5 starsReviewed on 4/26/2025
Dr. Ganz makes it easy to communicate with him and he responds to my questions and concerns and gives his input when requested. He s an excellent doctor!!
- 5 out of 5 starsReviewed on 4/24/2025
Very happy