Dr. Ralf Kiehl, M.D., is a board-certified radiation oncologist who treats patients at Sidney Health Center Cancer Care and Wound Care Clinic. Practicing in Sidney since 2018, he is a retired U.S. Army Lieutenant Colonel who earned his M.D. in Germany and completed oncology training at Yale. Certified by ABIM, he serves as Wound Care Medical Director and specializes in radiation oncology, hyperbaric oxygen therapy, stereotactic radiosurgery, and prostate brachytherapy.
Dr. Ralf Kiehl, M.D., is a board-certified radiation oncologist who treats patients at Sidney Health Center Cancer Care and Wound Care Clinic. Practicing in Sidney since 2018, he is a retired U.S. Army Lieutenant Colonel who earned his M.D. in Germany and completed oncology training at Yale. Certified by ABIM, he serves as Wound Care Medical Director and specializes in radiation oncology, hyperbaric oxygen therapy, stereotactic radiosurgery, and prostate brachytherapy.
The reviews listed below were collected independently of Sidney Health Center through rater8. Each review represents an authentic and verified patient experience.
Very positive , friendly and knowledgeable
(1 month ago)
Sep-2026
Always pleasant. Very kind and gentle and informative.
(1 month ago)
Sep-2026
Very caring and thorough doctor. Makes you feel that even difficult decisions are manageable and will be taken care of.
(5 months ago)
Apr-2026
Very understanding and caring. He explained everything in layman’s terms.
(8 months ago)
Feb-2026
Great guy.
Wealth of knowledge!
Nothing but respect for Ralf
(9 months ago)
Jan-2026
Awesome Doctor to work with.
(9 months ago)
Dec-2025
Very very good
(1 year ago)
Sep-2025
Dr Kiehl is such a pleasure to see. He is very informative, professional and personable. He always put me at ease and I always left pleased with my visit
(1 year ago)
Sep-2025
The spiders bite is still
(1 year ago)
May-2025
Did not make me feel rushed. Was kind and involved family heavily in my care.
(1 year ago)
Jan-2025
Sidney Health Center
216 14th Ave SW Sidney, MT 59270
Originally from Germany, Dr. Ralf Kiehl, M.D., practiced medicine as a Radiation Oncologist for more than 20 years in the New York area before moving to Sidney in January 2018.
Dr. Kiehl started his career serving in the United States Army before going onto receive degrees in Psychology and Biology as well as a Doctor of Medicine in Internal Medicine. He completed residencies in Internal Medicine in Germany as well as the United States before specializing in oncology. Branches of specialization included doing Hematology and Medical Oncology Fellowships and completing his Radiation Oncology Residency at Yale University School of Medicine in New Haven, CT.
Before moving to Sidney permanently, Dr. Kiehl provided temporary coverage at Sidney Health Center Cancer Care from 2011 to 2018. As a Radiation Oncologist, Dr. Kiehl specializes in the treatment of cancer patients, using radiation therapy as the main method of treatment. He is passionate about preventative measures as well as diagnosing and treating cancer at its earliest stages.
He is a proponent of annual physicals, following a healthy lifestyle, and providing opportunities for people to get evaluated, especially in rural areas like Northeast Montana and Western North Dakota. In fact, he spearheaded an initiative to provide free screenings for area men ages 55 and older. The Men’s Health Screening has since become an annual event in March through a partnership between Sidney Health Center and the Richland County Health Department.
In addition, Dr. Kiehl serves as the medical director for the wound care clinic, where he has been instrumental in developing the wound care services to include hyperbaric oxygen therapy. This non-invasive treatment involves breathing pure oxygen in a pressurized chamber, which significantly increases the amount of oxygen delivered to body tissues via the blood. Our highly specialized team of caregivers closely monitors the progress of each patient’s wound care treatment and adapts their care plan as needed.
Specialty Radiation Oncology
Medical School Universitaet des Saarlandes – Homburg, Germany
Residency • Internal Medicine Residency: St. Louis University – St. Louis, MO • Hematology/Medical Oncology Residency: Yale School of Medicine – New Haven, CT • Radiation Oncology Residency: Yale School of Medicine – New Haven, CT • Asst. Professor Radiation Oncology: Albany Medical College - Albany, NY
Began practicing in Sidney in: January 2018
Specializes In/Practice Includes • Radiation Oncology • Stereotactic Radiosurgery • Stereotactic Body Radiosurgery • Prostate Brachy Therapy
Certifications • American Board of Internal Medicine • Retired Lieutenant Colonel, U.S. Army Medical Corps
Very positive , friendly and knowledgeable
Always pleasant. Very kind and gentle and informative.
Very caring and thorough doctor. Makes you feel that even difficult decisions are manageable and will be taken care of.
Very understanding and caring. He explained everything in layman’s terms.
Great guy. Wealth of knowledge! Nothing but respect for Ralf
Awesome Doctor to work with.
Very very good
Dr Kiehl is such a pleasure to see. He is very informative, professional and personable. He always put me at ease and I always left pleased with my visit
The spiders bite is still
Did not make me feel rushed. Was kind and involved family heavily in my care.