-Call us at (517) 377-2455. Please allow 24-48 hours to receive a return phone call. 

-Email us at support@mifunctionalmed.com.

-Fax us at (833) 237-3335.

Office is Open by Appointment Only. Please contact the office before stopping by.

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Dr. McSwain considers herself a partner in health for her patients. She is a Doctor of Osteopathy with residency training in Obstectrics and Gynecological Surgery. She began focusing her practice on wellness medicine with an emphasis on age management. She has received training from the Institute for Functional Medicine as well as the American Association of Anti-Aging Medicine.

A large emphasis in her practice is using Osteopathic Manual Medicine (OMM) to realign the body. Improving one's function comes from adjustments to one's form. She has a keen understanding of how the body's systems are interconnected and how each one affects the others, promoting healing and increasing overall mobility.


Dr. McSwain  received her undergraduate at Arizona State University. She attended Midwestern University College of Osteopathic Medicine. Now, she serves the communities of Lansing and Grand Rapids as a Functional Medicine Doctor and Functional Gynecologist.

Dr. McSwain recognizes that optimal health is different for everyone, so she takes the time to know and fully understand her patients and how their bodies function individually. This ensures that each health plan is specifically designed for the individual patient. 

She is committed to identifying the unique underlying causes of disease and treating them with the best diagnostic tools and technologies from conventional medicine, as well as emerging tests and toold that help to identify critical imbalances that are the root of all illness. She believes in patient-centered, not disease-centered, medicine. 

Healer. Physician. Educator.


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Serving you as your health coach allows me to support you through your journey of recovering from chronic disease toward better health and a functional life. A journey that I know personally so that I may support you more professionally. 


I was a person with chronic disease, struggling to simply make it through my day.  Working and maintaining a social life and exercising to be healthy, all while searching for answers, was draining the life out of me.  I just wanted to feel normal, which I didn’t know anymore what that would consist of.  My ingrained desire to help others was thwarted because I couldn’t even help myself.  I understood what needed to happen, but I couldn’t find doctors or counselors to help me scale the mountains of information to get to the root cause of my issues. To make things worse, everyone thought that my problems were in my head.  I had no confidence in myself and my decisions, medical or otherwise. 


I couldn’t even move anymore.  I had pushed myself past my limits.  This meant having to sell my business because I couldn’t keep up the pace.  


Then, as if by chance, something amazing happened…  I recognized that I needed to persevere to find the answers that no one was going to provide for me.  It was now crystal clear to me how to get to the root cause of the problem.  I could get better!  I wasn’t crazy! I learned that I didn’t have to travel on my healing journey alone… I needed help and support.  


I found a team that works with me. Help came through connecting and working with a functional medicine doctor and coaching services. I began feeling better.  Slowly, I was gaining control of my health.  After testing and evaluating the results, the root cause of my illness was found:  heavy metal toxicity.  


Once I was on the right path, my healing journey rapidly improved in less than a year.  I didn’t recognize myself and couldn’t believe that the disease had transformed to ease. My plan was to start working on each area which was identified. So I worked with my physician led team to develop mini-plans in each area that I needed to work on.  We followed the plan step-by-step.  We evaluated my long-term health as a long-term resource. 


I was not only able to move my body, I had energy and good recovery time.  The residual soreness had decreased.  I am no longer reliant on supplements for metabolic support to function, because my functional medicine regimen helps me understand what I need to feel good for the long haul. 


But there was still a problem… Old habits die hard.  New habits are created, but we are not perfect.  We have to always work on the muscle memory in our minds.  It’s an ongoing process which keeps evolving.  

My discovery that the struggle was true for others as well as myself made my convictions stronger.  I could do this for myself while helping others work through their health issues. 

Functional Medicine Health Coach



Tammy was working at a job that was more corporate than patient care and frustrated with a lack of caring for people. At the time she had no control over what she could do to optimize care for people.⁣ She was restricted by management as to what she could do or say to patients. That meant she felt defeated in her career and no longer pushed herself to be better at her job. ⁣She learned how toxic the beauty industry is, and no longer looked forward to going to work or learning new information about her career.⁣

Then, as if by chance, something amazing happened...⁣

She was approached by Dr. McSwain, a friend who owns Michigan Center for Functional Medicine, to draw her patients' labs. ⁣Upon working with Dr. McSwain and her patients, Tammy remembered what it felt like to show real care. She saw patients healing and feeling like they are in control of their lives!⁣ 

Instantly, it became crystal clear that she has a choice in how she lives her life. She was so inspired by the healing and growth around her, that she decided to continue her education and combine careers as a phlebotomist and an esthetician to better serve her patients. ⁣
Her plan was to continue her education as an esthetician, and focus more of her time at MCFM, and that's what she did.

She is thrilled to work some place that she feels valued and help her patients truly heal.⁣ As an esthetician, her role is helping people get better. She is also expanding her knowledge by working side by side with the Doctor!⁣

Licensed Esthetician. Licensed Phlebotomist


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Mary has served as a bodyworker since 1990, a 3rd degree Reiki practitioner since 2002, and esthetician and instructor since 2004.


She brings a plethora of skills to enhance the experience of each guest. She seamlessly integrates her knowledge and training from such areas as aromatherapy, lymphatic manipulations, massage, pressure point, and energy work, with the goal of bringing each guest to a high level of relaxation and serenity.


She believes that when stress is addressed in a preventative manner on a regular basis, it allows the body, mind and spirit to flourish. Mary is driven by a model of excellence where each guest feels nurtured, respected and valued, and committed to providing extraordinary treatments with unparalleled results.


She draws great inspiration from the famous saying of Maya Angelou: “I’ve learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.”

Licensed Esthetician, Reiki Practitioner