Dr. Kitiwan is a board-certified American internist and nephrologist actively practicing in Kentucky. He finds great fulfillment in his role as a medical detective, providing care to patients with kidney diseases. Prior to immigrating to the United States, he received his medical degree with first-class honors from Thailand's most prestigious and oldest medical school. His journey in the medical profession continued as he completed his internal medicine residency in Baltimore, where he was recognized as the Outstanding Resident of the Year and was awarded multiple Scholarship Prizes. He then pursued a nephrology fellowship at the University of Maryland Medical Center. In his endeavor of enhancing his analytical and quantitative epidemiological skills to better address clinical issues and translate findings into evidence-based practices for the improved care of his patients with kidney-related conditions, he successfully earned a Master of Public Health degree from Harvard University.

His research interests center around nephrology, with a specific focus on kidney transplantation, patient safety, and quality measurement within healthcare settings. While he was a medical resident, his mentor introduced him to an article titled "Humoral Theory of Transplantation," authored by Paul Terasaki. This article deeply intrigued him as it elucidated how the interplay between innate immunity and adaptive immunity contributes to the rejection of kidney transplants. During his elective rotation, he spent time at Brigham and Women's Hospital, a Harvard-affiliated teaching hospital where the world's first successful kidney transplant was performed by the Nobel Prize winner Dr. Joseph Murray. There, he immersed himself in learning the intricacies of single antigen beads and complement-dependent cytotoxicity in the tissue typing lab. This exposure to immunobiology not only piqued his interest but also ignited a deep passion for this specific realm within nephrology.

He then successfully completed research projects on antibody-mediated graft injury and presented the findings at the Annual Scientific Exchange meeting. For his oral presentation, he was honored with the Young Innovator Award by the American Society of Transplantation. Subsequently, these results were published in the American Journal of Transplantation. Moreover, he collaborated with his mentor to design and launch a study examining the characteristics of transplant glomerulopathy and its associated risk factors. Under the mentor's guidance, he also authored an editorial addressing the role of HDL as an independent risk factor for late adverse cardiovascular events in kidney transplant recipients, which was published in the Transplant International Journal. While working with Harvard mentors, he conceptualized and conducted epidemiological research on “The Association of Urine Osmolality with Decreased Kidney Function and/or Albuminuria in the United States” using the National Health and Nutrition Examination Survey (NHANES) database, which was published in BMC Nephrology. He also delivered presentations at both local and international meetings, including the Harvard T.H. Chan School of Public Health, the World Congress of Nephrology (WCN), the American Transplant Congress (ATC), the American Society of Transplantation Annual Scientific Exchange (ASE), the Mid-Atlantic Nephrology Young Investigator's Forum, the Heart Failure Society of America (HFSA), and the American College of Physicians (ACP)-Maryland Associates Scientific Meeting. Furthermore, he contributed as a co-author to a book chapter on "Kidney Transplantation: A Practice Guide to Medical Management" and authored content on the Renal Fellow Network website. These accomplishments further inspire his commitment to fostering an intellectually stimulating environment that promotes innovative approaches, utilizing epidemiological skills to enhance outcomes in kidney patients.

In addition to his research work, he has served as a medical director of dialysis programs and volunteered as faculty in nephrology at various institutions, including the University of Maryland School of Medicine, the University of Kentucky College of Medicine, the University of Pikeville, and Lincoln Memorial University. He has also participated in hospital committees, particularly those related to education and critical care. He is a fellow of both the American College of Physicians and the American Society of Nephrology.

In his free time, he cherishes moments spent with his family and derives both solace and joy from a diverse range of activities, including playing the piano, staying active through regular exercise, finding inner peace through meditation, indulging in the world of literature by reading, and embarking on enriching adventures to explore different cultures and savor unique cuisines through his travels.