Develop a long-lasting relationship with your healthcare provider.

Internal Medicine is the medical specialty dealing with the prevention, diagnosis, and treatment of adult disease. As Internists, we use non-surgical approaches to treat medical conditions that affect adults from the ages of 18 years and older.

Internal Medicine

Internists are skilled in the management of patients who have undifferentiated or multi-system disease processes. Because we care for adults of all ages, we have the opportunity to develop long-lasting, rewarding relationships with our patients.

Patient-focused care

Meet the Team


  • Board Certified

    Dr. Mark Lindemann, DO is an Internal Medicine Specialist in Fort Worth, TX, and has over 22 years of experience in the medical field. He graduated from the University of North Texas Health Science Center-Texas College of Osteopathic Medicine in 2000.

  • Certified Family Nurse Practitioner

    Kelsey Nichols is a Family Nurse Practitioner with more than 10 years of clinical experience in healthcare. Originally a Tennessee native, she graduated from the University of Tennessee at Chattanooga in 2011 with a Bachelor’s degree in nursing. She practiced as a registered nurse in the emergency room, including several years as a travel nurse, until receiving her Master’s degree from the University of Texas at Arlington in 2020.

    She has a particular interest in root cause medicine. She utilizes a whole-systems, personalized approach that often goes beyond conventional practices to find the best treatment options and lifestyle modifications to fit your individual needs. 

    She is currently accepting new patients and is available to book appointments for complex medical issues, annual exams, as well as sick visits, and same-day appointments. 

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Get started with care, today.