St. Luke's Clinic

Welcome to St. Luke's Clinic – Internal Medicine. We are a team of trained and experienced medical professionals, skilled in medical care for adults, including routine and preventative health checks, diagnosis and treatment when a medical problem is first suspected, and on-going management of chronic illness.

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Internal Medicine
4840 N. Cloverdale Road
Boise, Idaho 83713
(208) 706-8000
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Office Hours:
Mon - Fri, 8 a.m.-5 p.m.

Internal medicine is devoted to the comprehensive care of adult patients and includes (but is not limited to) diagnosis and treatment of:

  • Heart disease and hypertension
  • Kidney disease
  • Gastrointestinal problems
  • Arthritis and other joint problems
  • Allergies
  • Cancer
  • Anemia
  • Lung problems such as asthma and emphysema
  • Infections
  • Neurological problems such as strokes and seizures
  • Nutritional problems
  • Depression
  • Skin disease
  • Diabetes and thyroid disease

New Patients / Appointments
We are accepting new patients.
To contact us or to make an appointment please call (208) 706-8000.

After-hours and Weekends
Our physicians alternate being "on call" for emergency care before and after our regular office hours. The physician on call can be reached by calling our office at (208) 706-8000.

What is Internal Medicine?
Internists are sometimes called primary care physicians. They are fully trained specialists in adult medicine, much like pediatricians are specialists in the care of children. Internists are specially trained to care for complex medical problems in the office and in the hospital (including coronary and intensive care units and the emergency department), providing a smooth continuum of care. We are prepared to handle severe chronic illnesses and situations where many illnesses occur at the same time. Internists are also capable of performing a variety of technical medical procedures. Severe medical illnesses often require the broad training and skills of internists to coordinate highly trained care teams. As internists, we keep the whole patient in mind, rather than merely focusing on a single disease or organ system.

Working closely with our physicians are physician assistants (PAs) and nurse practitioners (NPs). Also known as "advanced practice providers," PAs and NPs provide follow-up care for acute or chronic illness if your doctor is not available, and may provide annual exams and procedures.

St. Luke's Clinics
St. Luke's Clinics are an integrated network of highly skilled health care professionals in locations throughout our region.

Our Medical Providers

Susan Baxter, MD Susan Baxter, MD is a diplomate of the American Board of Internal Medicine. She earned her bachelor's degree from the College of Wooster and her medical degree from the Medical College of Ohio. She served her internal medicine residency at MetroHealth Medical Center in Cleveland, and joined St. Luke's Internal Medicine in 2007.
Jason Bronner, MD

Jason Bronner, MDis board certified in internal medicine and provides primary care for adults, including preventive care and diagnosis and treatment of acute and chronic diseases. He enjoys the critical thinking and problem solving that comes with being a primary care provider, and believes that although the world of medicine can be serious and frightening at times, a good sense of humor when approaching one's health can sometimes be the best medicine. Dr. Bronner earned his medical degree and completed his residency at the University of Washington School of Medicine. He practiced internal medicine and served as associate clinical professor of medicine at the University of California, San Diego School of Medicine.


Maria Ewings, MD Maria Ewings, MD is board certified in internal medicine. She earned her medical degree from the University of Washington School of Medicine. She completed internal medicine rotations in Nicaragua and the Marshall Islands, and performed her internal medicine residency through the University of Washington's Boise Primary Care Track. Dr. Ewings served as chief resident of the University of Washington Department of Internal Medicine, Boise Veterans Affairs Medical Center.
Mark L. Holbrook, MD Mark L. Holbrook, MD is a candidate to the American Board of Internal Medicine. He earned his BS degree in genetics from Purdue University and his medical degree from Indiana University School of Medicine. He served his internship and internal medicine residency at the Kalamazoo Center for Medical Studies of Michigan State University. Dr. Holbrook joined St. Luke's Internal Medicine in 1995.
Gretchen Kohler, MD Gretchen Kohler, MD is a diplomate of the American Board of Internal Medicine. She earned her bachelor's degree in biology from the University of Wisconsin and her medical degree from the University of Wisconsin Medical School. She served her internship and residency at Wilford Hall Medical Center, Lackland Air Force Base, Texas. Dr. Kohler joined St. Luke's Internal Medicine in 2006.
David C. Nielsen, MD David C. Nielsen, MD is a diplomate of the American Board of Internal Medicine. He earned his BS degree in chemical engineering from Brigham Young University. He earned his medical degree at the University of Washington and completed his internship and residency at Oregon Health Sciences University. Dr. Nielsen joined St. Luke's Internal Medicine in 1995.

Your Appointment
We try to stay on time, as a courtesy to you and others. Since paperwork may take a few minutes, please arrive early. As emergencies do occur, there may be occasions when your appointment time will be delayed. We will always try to keep you informed in the event of a delay, and will be happy to reschedule your appointment, if you prefer. We ask that you respect the appointment time we have reserved for you, and call 24 hours ahead to cancel or change appointments so that others may be helped during that time.

Communication with your provider is extremely important. It may be helpful for you to write down questions for your doctor or nurse practitioner prior to your visit. Bring a list of medications and the dosages, or bring the bottles with you.

Make sure you understand any instructions you are given. If clarification is needed, review your instructions with the provider or medical assistant before you leave. If you aren’t doing well after your visit, we want to hear from you. Our goal is to improve your health.

Insurance Plans
We accept most insurance plans, including Medicare, in-state Medicaid, Tricare, Blue Cross/Blue Shield, and others.

Medication Refills
Talk with your provider at each visit to be sure your prescriptions are up to date. When you need to refill your prescriptions, you can request them directly through your myChart account.

You can also request a refill by contacting your pharmacy. Your pharmacy will then contact our office for verification and approval. For patient safety, narcotics cannot be refilled outside of office hours. Talk with your provider before your prescription runs out, and please allow 48 hours for refills.

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