Your Healing Starts Here




We often work with individuals who know something is wrong, but have not been able to find the answers on their own. People struggling with fatigue, brain fog, mood swings, or stubborn weight that is preventing them from showing up as their best self. They are feeling confused, overwhelmed, and alone. If that is you, book your free call today with our team to find out if our whole-person, root-cause approach is the answer you’ve been looking for.

GI - Gastro Intestinal

Conditions like reflux, irritable bowel, constipation, digestive problems and bloating


Diabetes, obesity, hypertension, high cholesterol and heart disease

Mental health

Disorders like depression, anxiety, OCD, and ADD


Problems like acne, rosacea, dry skin and eczema


Disorders like crohns, hashimoto’s, psoriasis, rheumatoid arthritis and multiple sclerosis

Pain & Energy

Conditions like fibromyalgia, arthritis, insomnia and chronic fatigue


Problems like recurrent sinusitis, rhinitis and asthma


Imbalances and thyroid problems

Weight Loss

Finding the underlying conditions that may be effecting your ability to lose weight, and keep it off.

Is your condition not on the list?

Talk to our team today.

Make Your Health a Priority.

I certainly will.

Why We Treat

Dr Loy Anderson, M.D. has been practicing medicine for nearly 25 years. She is board certified in Family Medicine and Functional Medicine. She completed undergraduate training with a BS in Biology at Walla Walla University, followed by her MD at Loma Linda University.

After a 3-year residency in Family Medicine, she was honored to serve in the US Air Force for 4 years, stationed at Malmstrom AFB. She then joined the Great Falls Clinic, where she thoroughly enjoyed her colleagues and caring for families and patients of all ages until 2017. She is passionate about educating and has lectured on women’s health, stress management, hormones, inflammation, autoimmune disease, obesity and weight loss, thyroid, and brain health.

Dr Anderson combines her extensive experience and skills in traditional western medicine with the innovative and intuitive power of functional medicine to offer you the best of both. She is sustained daily by her unshakeable faith, has a beautiful daughter Alex, and a chocolate lab named Maya. When not serving her practice members or leading her team, she loves to hike, drive fast cars, fly planes, snowshoe, garden, travel, read, and play the flute.


Where are you located?

Can you work with me?

Our main office is in Great Falls, Montana, but we are able to work with individuals nationally and internationally thanks to HIPAA compliant telehealth.

Telehealth — sometimes called telemedicine — lets you visit your doctor and receive care without an in-person office visit. Telehealth is done primarily online with internet access on your computer, tablet, or smartphone through video conferences and internet phone calls. This remote option is ideal for people who live in remote areas, or need consultation with a specialist whose office is an unreasonable or burdensome distance away. If you have internet access, we can help.

Let’s Get Started

Watch our free 15 minute Thyroid and Autoimmune Conditions Webinar today and start learning about what’s going on inside your body and what’s causing your symptoms. We’ll discuss some of the triggers that are making you feel unwell and some things we can do to help you regain your health. Our team is here to help your body to function at an optimal level so you can fulfill your purpose and live your life to the fullest.

get started

The sooner you start the journey, the more time you’ll be able to enjoy.


It’s absolutely worth the work, effort, and time you put in! I’m loving the results so far and feeling more like myself. I’m integrating what I’m learning into my life and know I’ll always be able to use the positive new skills + tools I’m gaining. I’m incredibly GRATEFUL for Dr. Loy and the entire Thriven team.

Suzi Mandel

I am so thankful for the guidance from the Thriven team and the other practice members who have given me so much knowledge and the tools to continue my healing process. I honestly feel that my quality of life will be improved because of the changes that I’ve been taught through the program.

Patty Patrick

I have received not only information to stay healthy, but the coaching and encouragement from the staff was exactly what I needed. Getting to the “root” of problems leads the way to better health and sustainability. I believe my health is better for the wisdom of Dr. Loy, and her search for each one of us in better health. It’s all about choices for each one. My thanks for this team of people!

Kay Broderick

Functional Medicine Blog

Barb & Gary Mayer

Barb & Gary Mayer

The Bible says, “two are better than one, for if one of them falls down the other is there to help them get up again.” The first point in this story is how happy we are that we decided to do it together. Barb’s decades of sleuthing and guessing had not produced...

Not ready to start a discovery call?

Contact our clinic by email and we will get back to you as soon as possible.