About Functional Health Care, Sioux Falls

Our Clinic in Sioux Falls

Functional Health Clinic, opened in 2014, as the FIRST Functional Medicine Practice in Sioux Falls, S.D. The clinic continues to operate under the direction of solopreneur Marsha Kadlecik, PA-C. Thanks to Marsha's commitment to practicing without outside influence, Functional Health Clinic does not participate with major medical insurance companies, allowing her to provide comprehensive care with long-term longevity as the central focus.

Functional Health is for You

Our comprehensive, integrative services are designed to leave you healthier than you arrived. We work collaboratively and cooperatively to equip you with the knowledge and tools to ensure your future is healthy and free of Catastrophic Health Crisis.

Meet Marsha Kadlecik, PA-C

With a quarter-century of experience as a Physician’s Assistant, Marsha Kadlecik has built her Practice on providing Comprehensive Integrative Healthcare in the Sioux Falls region.


Having graduated from Yankton High School, Marsha initially pursued nursing, earning her Licensed Practical Nursing degree at Northeast Community College in Norfolk, Neb., followed a Nursing Sciences degree at the University of South Dakota and Mount Marty College in 1988. After obtaining her Registered Nursing license, Marsha spent 15 years as a hospital nurse on Medical-Surgical, ICU, Peds, Pulmonary, Psychiatry and Geriatric units. Marsha credits her internship with the Yankton Sioux Reservation while attending UND enlightening her to the lack of integrative Alternative Healthcare solutions that honors the human person and the earth in this region.


With a new focus on Functional Health, Marsha pursued her Physician’s Assistant degree, graduating from the University of North Dakota in 2000. Early in her practice, Marsha worked within a variety of disciplines at Acute Care Clinics until she opened Sioux Falls’s first Functional Health Clinic in March 2014.


Today, Marsha provides her patients with Cutting-Edge Medical Services based on a solid foundation of science and nature through her unique approach and knowledge base developed over years of experience. Functional Health Clinic provides a peaceful, comfortable environment more similar to a spa than a traditional clinic for those in need of medical services, including Acute Care, Chronic and Preventive Health Care. She specializes in Integrative Cancer Treatment, Aesthetic Procedures, Weight Management, IV Nutritional Therapy, PRP and Stem Cell Regenerative Therapy and Medical Cannabis.