About Us



Digestive wellness

Food allergies & intolerance

Hormonal Imbalances

Optimizing Weight Balance

Autoimmune Diseases

Depression & Anxiety

Thyroid Dysfunction

Adrenal Dysfunction

Chronic Lyme Disease

Mold Toxicity


Chronic Fatigue Syndrome/Myalgic Encephalomyelitis

and more...

Stefany Carstensen, FNP-C, RYT, IFMCP
I became a Nurse over 20 years ago, and initially, I worked in the inpatient hospital setting, in a variety of settings including oncology, Bone Marrow Transplant, ICU, Labor and Delivery and a Medical Surgical unit. I rapidly became frustrated by the fact that so many of the patients I cared for struggled with chronic diseases that were often related to choices in diet and lifestyle. Additionally, the traditional Western medical system was not focused on healing, it seemed focused on treating symptoms without actually improving patient health.  After I became a Nurse Practitioner in 2008​, I dedicated my practice to helping patients improve their lifestyles and nutritional approaches, while working to empower patients with education and supportive self care strategies.  
My approach with patients is patient centered and compassionate. My goal is to partner with you, and to offer you tools, education and support so that you can feel and be your very best. I utilize Functional Medicine principles in order to truly get to the root cause of your symptoms, and together, we will develop a comprehensive treatment plan that is effective, manageable and focused not just on treating your symptoms but on restoring balance to your body.  
I graduated from the University of Colorado College of Nursing with a Bachelor's Degree of Science in Nursing in 2000. I returned to school a few years later, and graduated from my alma mater with a Master's Degree in Nursing in 2008 and became Board Certified as  a Family Nurse Practitioner. Finally, out of a desire to deepen my own spiritual and yoga practice, I completed a 200 hour Yoga Teacher Training with Whole Yoga in Denver Colorado in 2013. Additionally, I have continued my education in the fields of Integrative Medicine and Functional Medicine with the Institute of Functional Medicine on an ongoing basis, and have the honor of being granted the designation of Institute for Functional Medicine Certified Practitioner (IFMCP) in December 2019. 

Melissa Roberts

Administrative Manager

Originally from Northern Virginia, Melissa has lived in Colorado for almost 15 years. Her interest in medicine began in high school when she completed a year-long internship shadowing an OBGYN. After graduating from CU-Boulder with a degree in Communication, Melissa went on to become a certified birth doula and received her Master’s Degree in Somatic Counseling Psychology in 2014. 


Melissa has worked at several alternative health clinics throughout the years and is excited to be a part of Serenity Functional and Integrative Medicine as she knows firsthand the power of an integrative approach to health. In her free time, Melissa loves being outdoors and spending time with her wife, super cute twins, and cattle dog, Pinoe. 


Julie Fenn, RN, BSN


Julie graduated with a Bachelor's degree in Nursing from the University of Arizona in 2008. Since then, she has worked in a variety of settings throughout Denver, including intensive care units, GI surgical oncology, in-home IV nursing, and endoscopy (digestive health). She is currently obtaining her master's degree at CU Denver, in the Family Nurse Practitioner Program. In her free time, Julie loves spending time outside ~ gardening with her flock of hens and checking on her beehives in the early mornings. In the summertime, she can be found running around the beautiful Colorado mountains, enjoying the sunshine and the views.