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Internal Medicine

From age 18 to 98, many adults prefer a specialist in internal medicine to serve as their primary care physician. At Mary Rutan Internal Medicine, we have five primary care providers that offer a broad spectrum of specialties and care models to best serve you and your ideal care type. Our providers are here to support your health and wellness needs.

What is Internal Medicine?

Internal Medicine providers, sometimes known as internists, are primary care providers that specialize in caring for the adult population. They provide comprehensive care for their patients and often form life-long relationships with them, allowing them to cater a care plan to each individual. Our Mary Rutan Internal Medicine Clinic is made up of physicians and nurse practitioners who provide screening and wellness exams that allow them to identify and treat various chronic and acute diseases. From treating the common cold, to completing physicals, to chronic disease management, an internal medicine provider provides personalized primary care for adults.

Many of our providers are accepting new patients! Call our office to schedule an appointment with one of our Internal Medicine providers. You do not have to be a patient of Internal Medicine to see Dr. Schilling for Osteopathic Manipulative Medicine appointments or Kari Barrows, CNP, for Functional Medicine appointments.

Our internal medicine services and areas of focus include:

  • Allergies
  • Alzheimer's
  • Asthma Treatment
  • Arthritis
  • Back Pain
  • Cancer Screenings
  • Depression
  • Diabetes
  • Diet/Exercise
  • Heartburn
  • Heart Disease
  • High Cholesterol
  • High Blood Pressure
  • Incontinence
  • Non-Emergency Illness
  • Osteoporosis
  • Prostate Exams
  • Respiratory Problems
  • Wellness Exams


  • Kari Barrows, CNP
    • Kari is a practitioner of functional medicine which focuses heavily on lifestyle and preventative medicine, looking at a patients’ genetic and social risk factors and working with them to create sustainable changes leading to a healthier life. Kari has been studying Functional Medicine through the Institute of Functional Medicine since 2016 and received her certification as an IFM practitioner in the fall of 2021. Kari’s primary area of focus is gastrointestinal health and its far-reaching impact on an individual’s overall wellbeing.
  • Indrani Chutkay, MD
    • Dr. Chutkay completed Medical school in India at Gandhi Medical College. While in India, she completed a two-year OB/GYN Residency. After coming to the U.S., she changed her field of study to Internal Medicine and completed her residency at Saint Vincent Charity Hospital in Cleveland. Dr. Chutkay has special interest in Women’s health and Geriatric medicine. She joined our Internal medicine team in 2013 where she focuses on traditional medical practices to further the health of her patients.
  • Angela Rutan, DNP, FNP-BC
    • Angela Rutan, DNP, has extensive medical experience with a nursing background of more than 35 years. After she gained experience as an RN, Angela Rutan, DNP, decided she wanted to further her Nursing career and become a Nurse Practitioner. For over 20 years, Angela practiced as a CNP in Internal Medicine. In 2022, Angela earned her DNP from Ohio University. She has a special interest in obesity medicine and primarily treats chronic health conditions with special emphasis on dysmetabolic disease, diabetes, cardiovascular conditions, and hormonal imbalances.
  • Matthew Schilling, DO
    • Dr. Schilling is a practitioner of Osteopathic Medicine and has the ability to use Osteopathic Manipulative Treatment, a hands-on treatment used by Doctors of Osteopathic Medicine who use their hands to examine functions of your body to diagnose illness or injury and facilitate your body’s natural tendency toward self-healing, as a part of your care routine. Dr. Schilling sees patients at both our Internal Medicine Clinic, as well as our Pediatrics Clinic.
  • Winfred Stoltzfus, MD
    • Dr. Stoltzfus graduated from the University of New Mexico School of Medicine in 1984 and went on to complete his residency at the Southwestern Michigan Health Education Center. He now has over 35 years of experience in the medical field. Dr. Stoltzfus joined the Mary Rutan Health team in 2007 and provides primary care to adults 18 and older, though he has special interest in geriatric medicine, diagnosing and treating a wide range of chronic and acute illnesses using traditional medical practices.