
Her clinical experience includes several years of level one trauma, neurosurgical critical care, emergency medicine, primary care and cardiothoracic surgery. In addition to her clinical experience, she was an Assistant Professor within the Graduate Department of Nursing at Georgetown University, School of Nursing and Health Studies in Washington, DC. At Georgetown, she has acted as a course coordinator and chair of the Evaluation Committee.
She was appointed Faculty inter-professional simulation representative and Dedicated Education Unit (DEU) advisor in the academic setting. In addition, she has corporate healthcare experience acting as a Corporate Manager of Clinical Education as part of the Nurse Executive team, servicing 5 hospital sites and overseeing all aspects of clinical education for the Health system with >10,000 employees.
Dr. Jennings has been appointed as “Expert Witness” in several malpractice legal cases and acted as editor for several clinical publications, and has also served on healthcare boards and volunteered her time providing care to the under-served population.
She has been appointed a podium speaker at national conferences; has peer-reviewed publications in refereed journals and was awarded a U.S. and Trademark Office Patent which was presented at the UNC Trauma Conference 2012.

As a young girl, Nicole would help care for her father, who was battling Leukemia. She knew at the young age of 5, that she wanted to pursue a career in which she could help others. She has a passion for providing compassionate and quality care to her patients.
In her spare time, Nicole enjoys spending time with her family, hiking and reading a good book.

After moving back to Western NY, she wanted to continue her focus on wellness and living a healthy lifestyle. Diane feels her education and work history make her a perfect fit for Cardea Health Integrative and she's passionate about helping all our patients with their healthcare journey.

Debbie truly believes you are what you eat and uses food as medicine to treat and prevent chronic medical conditions and restore optimal health. Her philosophy of holistic health encompasses diet, exercise, sleep, stress reduction, and human connection. Although weight loss is often the goal of many, it is her belief that by restoring health in the body weight loss will happen naturally. She will meet patients where they are and customize a personalized plan to help them reach their health and wellness goals.
When Debbie is not working she enjoys spending time with her 3 teenage sons. She loves to stay active and spend time outdoors and enjoys training for triathlons, hiking, skiing, yoga and Pilates.


Rayna’s clinical background is in obstetrics, gynecology and neonatology. Through her woman’s health background Rayna has been able to aid many underprivileged populations through various community health programs.
While she is not working Rayna enjoys spending time with her family, cooking and exercising.
Rayna very much looks forward to using her practice to touch the lives of the patients at Cardea Health and beyond!

Jenna has felt nursing was her calling since a young age. She enjoys learning about preventive medicine and loves to grow her own food and herbs at home. She learned all of her gardening knowledge on her family farm, which has inspired her to have her own farm some day!

In his free time, he enjoys spending time with his fiancé and their dog, Sadie.
David is excited to become involved with integrative medicine and looking forward to helping people feel their best.

About Us
The Practice
The name ‘Cardea’ (CAR-DAY-UH) is attributed to a goddess of classical Roman mythology whose name is derived from the Latin root word ‘cardo’ (i.e.: cardiac, cardinal) meaning hinge or axis. She was therefore considered to be the goddess of health, of thresholds (both physical and spiritual), as well as a goddess of the center. Her power is to open that which is closed, and close to that which is open – and to promote a centeredness which will lead to improved health and well-being. It is her aspects of acceptance, grace, patience, and compassion which form the core of our principles and approach to healthcare at Cardea Health Integrative (CHI).
Cardea Health Integrative
was formerly known as Preventive Medicine and Wellness Clinic. It was founded by Dr. Robert Barnes, DO and was located in Fredonia, NY in 1994. After 26 years practicing general surgery and family medicine, he turned his attention full-time to promoting and practicing alternative medicine. Dr. Barnes has truly pioneered the integrative/preventive model of medicine in our area and we pay homage to him as we move forward and continue to aid in shifting the healthcare paradigm here in the WNY region. Many of his long time patients remain with the practice to this day. Dr. Barnes transferred ownership of the practice in 2015 to Dr. Jennifer L. Jennings, and it was subsequently rebranded as Cardea Health Integrative, or CHI. Dr. Jen had been working with the practice for years and was the logical choice to take the solid foundation given by Dr. Barnes and bring it through to its next evolution.