Meet Our Team

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Dr. Xan Simonson

Dr. Xan Simonson

Dr. Xan Simonson, is an Arizona licensed Naturopathic Medical Physician in
Tempe, AZ who takes a gentle and natural approach to your healthcare. Dr. Simonson founded the Xan Medical Clinic for Regenerative Medicine in 2018 where she utilizes the most cutting-edge regenerative techniques to help reduce pain, restore function, and heal the human body.

She is trained in a variety of medical and wellness therapies including Regenerative Joint Therapy (Biologic Allograft), Trigger Point Therapy, Non-Surgical Facial Rejuvenation, Sexual Rejuvenation, Acupuncture, and Bio-Identical Hormone Replacement. She has completed additional advanced training in Comprehensive Pain Management and works with her patients, both treating and preventing injuries and to reduce their recovery time. She holds certifications in Peptide Therapy, Ozone therapy, Harper Restoration System, Biologic Allograft Therapy, Prolozone, Prolotherapy, Trigger Point, Suisse Neural Therapy, Non-Surgical Facial Rejuvenation, O-Shot, P-Shot, BoCox, BoPriapus, Vampire Facial/Facelift and Tennant Biomodulator Device. She believes that the body is the biological foundation of health; it has the natural ability to heal itself if given what it needs in the least invasive and most natural way. She recently has been identified as Top Doc 2020 in Tempe, AZ. 

She splits her time between her clinic and teaching other practitioners regenerative medicine. She is the Director of Medical Training and Advisement and Chief Medical Officer for BioJourney Solutions, LLC that provides regenerative health products to clinics. She recently has been identified as Top Doc 2020 in Tempe, AZ and featured in Shoutout Arizona Dec 2021 Issue. She has been awarded one of Top 20 Women of 2020 in the Arizona Woman’s Magazine, December 2007 Issue. She is the author of “Introduction to Biotechnology I & II Lab Manuals” published by Kendall Hunt. She serves as a member of the AzNMA Board of Directors and serves on their Education Committee and Governance Task Force.

In her free time she enjoys spending time with her grandchildren, hiking and reading. Her motto she practices daily is “A Vision Shared is A Vision Achieved.”

Alan Gifford, EPc

Alan Gifford Exercise Physiologist

Alan has a Master's degree in Exercise & Wellness from Arizona State University and a Bachelor's in Applied Psychology. He is a Certified Strength and Conditioning Specialist with the National Strength and Conditioning Association and a Taekwondo Black Belt.
For 12 years, Alan has helped patients recover from pain, correct muscle imbalances, and restore biomechanical function. His application of muscle movement has been applied to the full range of body types, from Olympic Athletes to 75 year old Retirees.

Dr. Johanne Gerstel

Dr. Johanne Gerstel NMD

Growing up in diverse cultural settings aided the development of character a person needs in a career of healthcare and research. Dr. Gerstel was born in the Philippines but followed her family to grow and flourish in various cultural roots of Filipino, Singaporean, and American descent. This constant change in lifestyle helped to evolve her perseverance and versatility so that she could pursue a career in healthcare and research development.

She finally settled down in Arizona to obtain her two Bachelor of Science degrees in Biology and Psychology at Arizona State University (ASU) while performing research in the field of neuroscience. On her journey to becoming a doctor, she decided to take a detour and worked in the field of behavioral health as a case manager and health and wellness coach for people with serious mental illness. It was during this time that Dr. Gerstel witnessed the lack of alternative therapies for behavioral health patients that spurred her passion to pursue a career that could provide an all-inclusive toolbox for her patients’ journey to better health. She enrolled in Southwest College of Naturopathic Medicine and after four years of hard work became a licensed NMD or Naturopathic Medical Doctor. During this time, she also participated in botanical medicine research which she has continued to pursue in a Molecular and Cellular Biology Ph.D setting at ASU.

Dr. Gerstel is trained in a variety of medical and wellness therapies including naturopathic family practice, trigger point therapy, acupuncture, botanical medicine, nutritional and lifestyle counseling, holistic counseling, nature cure, and energetic modalities such as craniosacral therapy and reiki. She is passionate about wellness and believes the root of most conditions is connected to our management of stress and our hectic lifestyle. If we reduce stress to healthy levels, we can help the body to start healing itself naturally. It’s no surprise that Dr. Gerstel’s favorite supplement is adrenal support. She believes that if we are going to be healthy, we MUST assist the body’s response to stress and lead our system to a parasympathetic healing state. 

In her spare time, Dr. Gerstel reads, writes fiction novels, crochets, hikes, enjoys nature, and spends time with her family and three fur babies: Jelly the Dog, Jams the Cat, and Kiwi the Lovebird. 


Ann Gifford

Ann Gifford Business Manager 1

I enjoy interacting with and helping clients. I've worked in clinical settings for several years in an administrative capacity. I'm currently helping at Xan Medical as a Business Manager, helping Dr Xan with the admin work so she can be the Doctor she loves being instead of the administrator she hates. I also help on the Medical Fitness side as a personal trainer, helping clients overcome pain through therapeutic exercise, stretching and light therapy. When I'm not working, I enjoy playing card games and board games with friends and family and watching Marvel movies. 

Collene Bender, LMT

Collene Bender Myofascial Massage Therapist

Collene is a licensed massage therapist who specializes in Myofascial Release and restorative therapies. She is the owner of Nurture the Spirit in Tempe, AZ and has been a therapist for over 20 years. Myofascial Release is a safe, and very effective, hands-on manipulative treatment that attempts to release tension in the fascia due to trauma, surgical procedures, inflammatory responses and/or also postural disorders. Connective tissues called fascia surround the muscle, bones, nerves and organs of the body and do not show up on many of the standard tests (x-rays, myelograms, CT’s, etc.) Collene is also trained in therapeutic yoga techniques. 

Alison Larson

Ali Larson Massage Therapist Biopic

Hi! I'm Ali. I attended Arizona School of Massage Therapy in 2001, and Nursing School at Phoenix College in 2013. I am a licensed Massage Therapist and Registered Nurse. Health and Wellness is my jam!

My mission is to assist in your healing journey. I'm an energy in-tuned being who thrives on listening to what the body needs. In my 20 years of experience, I've refined my practice by combining many massage modalities to provide clients a phenomenal, personalized experience. My ability to be in-tune with what is felt physically and emotionally sets me apart from the rest. I believe in the power of massage as a tool to help us heal — mind, body, and soul. It is my highest honor to hold and create the much-needed space to help you on your journey of recovery, healing, growth, and repair. 

You can find more information about me and how to schedule through my website at

Renee Flynn

Renee Flynn Front Office Manager

Renee has been with our company since 2019 and is one of the friendly voices many active and prospective clients hear when calling Xan Medical. Renee is a former CNA and may be seen helping collect patient vitals when not on the phone. Outside of the office she loves the beach, traveling, seeing new places, spending time with her family, flower designing and anything crafty. Renee says “ I love working at Xan Medical, it’s like a second family here and not just a job. I learn something new every day and have become so much more aware of my health and how to take care of my body in a natural way.“

Paulette Buhl

Paulette Buhl Front Desk Receptionist

Paulette started off as a patient at Xan Medical and had amazing success following Dr Xan’s protocols. She was able to reverse her health issues and now feels better than ever. She is the grandmother of Renee and started with XMC in 2021 as her front desk assistant. She has been a huge help to the clinic. She is always chatting with customers, helping out wherever she is needed and baking lots of yummy gluten-free, sugar-free treats for the office. Outside of the office she loves baking, quilting/sewing, doing water aerobics, spending time with her family, traveling to Michigan in the summers and going to church.

Call 480-584-3224 or contact us below
to schedule a consultation today!

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