Lois van der Hagen, MD


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Member of St. Peter's Medical Group

About Me

Lois van der Hagen, MD received her Doctor of Medicine from the University of Minnesota in Minneapolis, MN. She completed an internship and residency in Internal Medicine at University of Minnesota, as well as a hematology fellowship at the University of California, San Francisco. She is board certified in internal medicine.

Dr. van der Hagen earned a Bachelor of Science degree from South Dakota State University and an Associate of Arts degree in respiratory therapy from Rochester Community College in Rochester, Minnesota.

Previously, Dr. van der Hagen has worked as a hospitalist, and as an emergency department and urgent care clinic physician.

Education & Training

Medical School

University of Minnesota Medical School


University of California Hospital & Medical Center


University of Minnesota Medical Center - East Bank

Board Certifications

American Board of Internal Medicine


St. Peter’s Health accepts most major insurances. To verify that your insurance is accepted, contact the clinics’ Central Business Office at 406-447-2828.   

Patients are expected to furnish all the necessary health insurance information and sign the medical release and insurance assignment authorizations. St. Peter’s Health will submit complete insurance claims on the appropriate forms for the charges recorded. 

Keep in mind that insurance is a contract between the patient and his or her insurance company and that St. Peter’s Health is acting only as a billing agent. St. Peter’s Health cannot pursue payment from insurance carriers in the event of non-payment or benefit denials. If a patient’s insurance carrier has not submitted payment within 30 days of billing, St. Peter’s Health expects the patient to pay the balance in full. Patients receive a monthly statement showing any account activity and the remaining balance due.