IR Clinic

Eastern Radiological Associates (ERA) offers an interventional radiology clinic (IR) at the Yellowstone Medical building. We see patients who are candidates for specialized procedures performed by Dr. Brian Christenson

Often another physician will refer you to our office. You can also call our office directly.

We offer specialized services for the treatment of headaches, certain cancers, vascular malformations, cirrhosis and other conditions.

Learn more about IR Services:

We work closely with you and your other physicians to provide the services to you.

We are located at 2900 12th Ave North, Suite 4E. We are in the basement of the East building of the Yellowstone Medical Center. Please feel free to use the valet parking. Parking is also available towards the back of the building.

Our phone number is 406-237-5490 and our office hours begin at 8 a.m. through 5 p.m. Monday, Wednesday, Thursday, and Friday.

You will be greeted by our friendly and caring staff who will go out of their way to make your visit as comfortable as possible. Prior to your first visit, we will mail paperwork for you to complete and bring with you to your appointment. These forms can also be downloaded from our site (please see below.) Please bring with you a form of ID and insurance card for us to include in your records.

Acknowledgement of Receipt of Privacy Notice
Notice of Privacy Practices
Patient Information Sheet
Patient Medical Information


Dr. Brian Christenson, M.D. &
Dr. Stacy Stefflug PhD., Nurse Practitioner

Brian Christenson Stacy Stellflug

Dr. Stellflug plays a pivotal role assisting patients and preparing them for interventional procedures and coordinating the follow up care for our patients. Dr. Christenson and Stacy will review with you the treatment, risks, benefits, and alternatives and will answer any questions you may have as to enhance your understanding of the care we will provide. Once decided, our staff will schedule any lab work that may be required along with the procedure.

Our Staff:
Stefanie, Sierra, Linda