HRMC Physicians Clinic - Internal Medicine
Providing health care for adolescent through geriatric patients, including assessment, diagnosis, evaluation and treatment. As an internal medicine provider, they have specialized training to care for complex medical conditions, as well as management of multiple disease processes.
Meet the Providers
Doreen Boomsma, CNP

Doreen Boomsma provides care for chronic medical conditions as well as acute care, specializing in adult, occupational and women's health.
Christopher Bronson, MD, MS
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Dr. Bronson, board-certified by the American Board of Internal Medicine, has specific training to provide evaluations, diagnosis and treatments, such as heart disease, hypertension, diabetes and obesity, as well as chronic lung, kidney, and liver disease, among other problems.
Additional services offered by Dr. Bronson:
- 24-hour ambulatory blood pressure monitoring (ABPM), only available at HRMC Physicians Clinic. Patients who have suspected hypertension wear a device which periodically measures blood pressure during a 24-hour period. ABPM can help identify high blood pressure that may not be confirmed in regular clinic visits.
- Dr. Bronson also holds a certification to prescribe buprenorphine and offers Medication-Assisted Treatment (MAT) for patients in the region who are suffering from opioid use disorder. More information about MAT is available at www.AvoidOpioidSDS.com/Find-Help.
Kristen Hughes, MD

Dr. Hughes provides internal medicine treatment for all ages with a range of needs, emphasizing patient education encouraging patients to understand all aspects of their treatment.
Brett Mathers, DO

Dr. Mathers is an internal medicine physician for ages 17-70 and beyond, including diagnosis and treatment, preventative care and management of chronic and complex conditions.
Danielle Rathjen, DNP

Danielle Rathjen provides care for adults for acute care, chronic medical conditions, prevetnative medicine and helps patients meet weight loss goals.
Rebecca Runge, MD

Dr. Runge provides primary care for both acute and chronic conditions. She is passionate about internal medicine as it allows her to care for patients with complex issues while also forming close bonds with them. She will also serve as a hospitalist at HRMC.