Tracy Shulsinger, FNP-C, MSN

Board Certified Family Nurse Practitioner

Tracy is the owner of The Healing Collective Functional & Integrative Medicine. 


As a Family Nurse Practitioner (FNP), Tracy has worked with all ages of men, women & children, initially providing primary care for underserved populations in pregnancy care, women’s health, pediatrics, psychiatric, acute and chronic care, & home health. Prior to practicing as an FNP, Tracy was an RN for eight years in cardiac care, primary care, orthopedics medical/surgical, psychiatric care, women’s health, home health, and camp nursing. Tracy has also enjoyed several medical missions to Central America and has developed Spanish language fluency. 


Tracy found her true calling through Functional Medicine as she always has wanted to support clients to create deep, everlasting healing from the inside out. Functional Medicine is a new paradigm of care that seeks to find and heal the root cause of disease instead of treating the symptoms. 


Outside of work, Tracy enjoys practicing & teaching shamanic healing, spending time in nature, dancing, making pottery and spending time with her husband and daughter. 

To learn more about Tracy's Shamanic Healing practice

click here.

Dianne Villani, APRN, FNP-C, IFMCP FNP
Family Nurse Practitioner & Certified Functional Medicine Provider

Dianne Villani is a Family Nurse Practitioner and a Certified Functional Medicine Practitioner.


Dianne has cultivated her passion for integrative healing modalities over many years. She started studying herbalism while still in college, then went on to yoga and meditation, Healing Touch, and Ayurveda. She is also a certified Recode brain health practitioner.


She loves practicing Functional Medicine because that’s where all her skills and knowledge can come together to help patients achieve optimal wellness. Giving patients plenty of time and a supportive environment is the cornerstone of her approach. She sees her role as an interpreter and guide who collaborates with patients to uncover the roots of illness and create personalized wellness plans that are sustainable and effective.


Years of working with patients with persistent symptoms and her own journey through chronic illness have given Dianne unique insight. She understands how frustrating and confusing the search for wellness can be, and believes healing begins with trust and thrives with acceptance. She empowers her patients to define wellness for themselves and to create healthy habits that fit into their lives. If she’s not at the office, you can probably find Dianne digging in the garden, hiking with her two little dogs, or working on her camper van.

Dr. Jessie Tierney, PT, DPT, E-RYT

Doctor of  Physical Therapy

Jessie is a Doctor of Physical Therapy with specialized training in functional manual therapy, medical therapeutic yoga, and Frequency Specific Microcurrent (FSM). 


She empowers clients to optimize their movement patterns, get out of pain, and truly thrive in their bodies. Appointments provide clients with one-on-one, focused attention that addresses the root cause of movement dysfunction, providing hands-on interventions and education. Learn more about PT services here


Jessie loves helping individuals dealing with chronic or unresolved pain as well as those who are looking to optimize the way they move through life. Our bodies are meant to feel great, and Jessie offers an integrative approach to unveiling her clients' innate wholeness. She draws from over ten years of yoga teaching experience and over seven years in the physical therapy field with an intense passion for continuing education. She graduated from Wheeling Jesuit University’s Doctor of Physical Therapy program in 2018, where she conducted research on the effects of yogic breathing on chronic low back pain. She is an Experienced-Registered Yoga instructor certified through the ShambhavAnanda School of Yoga since 2010.  


When she’s not in the clinic, Jessie can be found exploring the trails on horseback, on foot, or by snowshoe, meditating, and practicing or teaching yoga.

Jennifer Gnisci, MA, L.Ac

Board Certified Licensed Acupuncturist

Jennifer is a licensed Acupuncturist with specialized training in Trigger Point Dry Needling based on the works of Dr. Janet Travell, Classical Chinese Medicine and Cranial Sacral Therapy (CST).  Jennifer’s undergraduate education is a Bachelor of Science with a focus in Neurobiology.


Jennifer helps people resolve acute and chronic pain conditions using an interdisciplinary combination of physical acupuncture and Cranial Sacral Therapy. Jennifer identifies tissue abnormalities and releases fascial adhesions through precision dry needling, resolving referral pain patterns and painful body biomechanics. Jennifer loves to support her patients through offering various stretches and exercises to prevent further injury.


Jennifer also has a passion for treating stubborn chronic illnesses. Thorough medical intake and Chinese diagnostics (pulse, tongue and palpation) allow Jennifer to not only treat the symptoms but also identify the root cause of the illness.  She has successfully treated nervous system imbalances, gastrointestinal and endocrine disorders, anxiety & depression and women’s wellness and fertility.  Jennifer combines an experiential and intuitive blend of Chinese Medicine and Acupuncture, Energy & Shamanic Medicine and Nutritional/Lifestyle Support to empower her patients to thrive in body, mind and spirit and live their best life.


Jennifer is also an Energy Medicine & Shamanic Practitioner. She is a graduate of the Four Winds Light Body School where ancient shamanic wisdom teachings are merged with cutting-edge practices in nutrition, biology and neuroscience. Jennifer is also a Master Astrologer. When Jennifer is not in the office she enjoys spending time in nature with loved ones, meditating and stargazing.  

Martha Ann Hammel, MS, CNS
Certified Nutritionist &Certified Neuro-Nutrient Recovery Coach

Martha Ann Hammel, MS, CNS, is a nutritionist and a certified neuro-nutrient recovery coach. She received a master’s degree in Nutrition and Integrative Health from the Maryland University of Integrative Health, where she wrote her thesis on the intersection of emotional trauma, addiction, and gut health.  She works on anxiety, depression, brain health, eating disorders, and addiction.  Her focus is based in neurochemistry and functional medicine, offering supplement strategies, gut-restoration protocols, and amino-acid therapy.


Martha is passionate about functional medicine and integrative health.  She has a background in permaculture and restoration ecology and sees strong parallels in the two fields.  The human body, like an ecosystem, is an intelligent, self-regulating organism.  The power of a healthy ecosystem is in the synergy of the parts, consequently, the health of an ecosystem is measured in how its parts remain in balance. All of her free time is spent playing the mountains, hiking, biking, skiing, backpacking, climbing, and exploring

Diane Zimmermann, ABMNP
Anat Baniel Method® NeuroMovement® Practitioner Advanced Certification in Children's Mastery

Diane Zimmermann, ABMNP is an Anat Baniel Method (ABM)® NeuroMovement practitioner with advanced certification in Children's Mastery. She holds a BA from the University of Maryland, College Park.


Diane faced her own struggle with pain and mobility because of a severe ankle injury that required reconstructive surgery. Diane’s recovery languished, and she found her path to healing through the Anat Baniel Method® of NeuroMovement® during her training to become a practitioner. 

Diane has completed both the Basic and Children’s Mastery certification programs and is pursuing ABM certifications in Vitality, Anti-Aging, and High Performers. She teaches group Transformational Movement Lessons (TMLs) and provides private one-on-one sessions at The Healing Collective.   

In addition to her ABM NeuroMovement training, Diane brings a wealth of experience to her practice.  A mother of three, she has experience as a behavior/academic coach for children with Autism, Cerebral Palsy, and learning disabilities. Diane is an avid seamstress and enjoys skiing, camping, singing & interacting with kids of all ages.

Margaret Sutherland,
Medical Assistant & Phlebotomist

Originally from Canada, Margaret has been living in Boulder since 2012.  She is a Certified Medical Assistant and phlebotomist with a background in internal medicine.  In Canada, Margaret earned a BSc in Nutrition and Food Science, practicing as a clinical dietician in Calgary and later in Bermuda.


Margaret has always believed in a multi-pronged approach to health as a lifestyle. Wellness via exercise is certainly important to her, and she also values the effects of mental stimulation and stress reduction on overall health. She values balance and variety as the spice of life!


She brings our all-new blood draw lab service to the Healing Collective, coordinates lab tests and helps the front desk run smoothly. 

Margaret enjoys running and has completed 16 marathons (so far)!  She also likes to spend time hiking in the mountains with her husband, two boys, and her dog, Kirby.


Gae Russo,
Medical Administrative Assistant

Gae has always been passionate about nutrition and fitness. She spent many years working in a physical therapy office and an athletic club where she learned the latest and greatest information on health.


Gae's journey into alternative medicine began a few years ago when she was diagnosed with an autoimmune disease. She was surprised when she became ill because she had faithfully followed all the advice from the experts. Traditional doctors tried to help, but finally said there was nothing more they could do. This is when she discovered Functional Medicine and all that it had to offer. It has turned her life around!

As the Director of Operations at the Healing Collective, Gae strives to create a positive, nurturing, and happy environment. She will answer your questions about the practice, help you set up appointments, and promote efficiency in the office to respect you and your time.   

When she's not at the office, Gae enjoys playing African drums and practicing Tai Chi.