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.
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.
Raul Octaviani, MD

Dr. Octaviani is a board-certified internal medicine physician who takes a whole-body approach to care, with a focus on the ideal health for each individual. He will get to know each patient, take inventory of current medications, diet, lifestyle, hormones and more to help each individual reach their optimal health.
Danielle Rathjen, DNP

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