We are a medical practice specializing in the primary prevention of illness and disease, as well as the optimization of overall health and wellness.

Traditional medicine is undergoing a fundamental and radical shift. Patients should not have to wait until they are feeling sick or ill (or until they have a diagnosis of disease) to visit their doctor. Optimizing overall health is no longer a choice — it is a responsibility.

Medicine should not be a generic “one size fits all” approach. We defy the traditional medical algorithms and assess patients as unique physiologic, genetic and emotional individuals. We form partnerships with our patients in order to help them establish and achieve goals for optimization of health. Because successful medicine requires a thorough assessment of the patient’s health history, current physical state, and genetic composition, it requires extensive, individualized attention from the medical practitioner and a customized treatment plan. Our treatment plans are safe, effective and sustainable.

Our goal is to educate and inform our patients about the latest cutting edge research. We work as a team to develop trusting relationships with our patients. We are committed to delivering preventative healthcare ethically and without harm. 

About Dr. O'Neil Smith

Kathleen O’Neil Smith M.D. is a magna cum laude graduate of Boston University Medical School. She completed an internship in pathology at Massachusetts General Hospital followed by an internship and residency in internal medicine at the Brigham and Women’s Hospital in Boston. In 2008, she completed a two-year fellowship in functional medicine through the American Academy of Anti-Aging and Regenerative Medicine (the subspecialty of bio-identical hormone therapy and primary disease prevention).

Dr. O’Neil Smith has an extensive background in nutrition, applied physiology, and sports medicine. She has been on the faculty at Tufts University School of Medicine and Boston University School of Medicine. For decades she competed as a member, and later coach, of the United States Women’s National Rowing Team. Dr. O’Neil-Smith is an international thought leader in the clinical use of peptide therapy. She is a compassionate, innovative, and conscientious physician.
About Dr. O'Neil Smith



Does insurance cover the cost of Treat Wellness?

Treat Wellness does not accept or contract with any health insurance plans. It is your responsibility to pay in full at the time services are rendered. We are able to accept credit cards (Visa, MasterCard and Discover), checks and cash. A receipt will be provided to you, as well as treatment codes that enable you to seek reimbursement from your insurance company.

Is Dr. Kathleen O’Neil-Smith M.D. able to provide a treatment plan for my symptoms by email or phone?

We are not able to provide a treatment plan by email or phone. It is imperative that signs, symptoms, and treatment plans are evaluated and communicated in person.

What is your cancellation policy?

A great deal of time is dedicated to each patient, as well as to the evaluation of test results. Thus, 90 minutes of professional time has been set aside for your initial visit and 60 minutes for your follow-up visit. You must notify the office at 617-630-2882 at least 48 BUSINESS hours prior to your visit if you need to cancel or reschedule your appointment. Failure to notify us in a timely fashion impacts our ability to care for the patients in our practice. Please be aware that your credit card will be billed for your scheduled visit for failure to comply with our policies.

What are your fees?

The fee for a 90-minute initial consultation is $750.00 (A $375.00 non-refundable deposit is collected at the time of booking). This includes a complete history, focused physical exam, an extensive nutrition and exercise consultation, as well as an individualized treatment plan for your specific medical needs. All fees for follow-up patient consults are based on an hourly rate. The fee for a one-hour follow up is $600.00.

Initial 90-minute MD Consultation: $750.00
Full office visit (or phone call): $600.00
Partial office visit (or phone call): $300.00
*Please note that fees are subject to change.*

What do I do if I have an emergency?

If you have a negative reaction to our treatment plan or other serious symptoms, please call us and discontinue the treatment recommended. Please contact your primary care physician or local emergency room with all urgent matters.

For more information...

Download ‘The New Patient Packet’ in the "New Patient Consultation" found in the "Services" section above.


Dr. O’Neil-Smith and Dr. Angeli Maun Akey’s new book, Kick COVID-19 to the Curb, is now available. The book is designed to answer all of your questions about COVID-19 with the most up-to-date information.

Kick COVID-19 to the Curb can be purchased as an e-book on Google Play, a Kindle copy on Amazon, or an audible book on Audible. A limited number of paper copies are available. Please email or call Farha at (352) 519-4844 to order a physical copy of the book.


NOTE: The information posted here is subject to change daily. Treat Wellness LLC is only offering COVID-19 in-office testing for patients that do NOT have a fever or cough. If you would like an at-home testing kit, please call or email us. 

*If you believe you have been exposed, please contact the office about specialty therapies (IV and Nebulized therapies) and testing.

Newton Wellesley Hospital COVID-19 information:
Phone #: 617-724-7000
-Stay on the line
-You will be screened/questioned
-If you qualify, you will be escorted to the next chain of command

South Shore Hospital information:
Phone #: (781) 624-8000
-Currently no tent testing
-Go to ER for evaluation

UMass Memorial information:
Phone #: (508) 334-1000
-Currently no tent testing
-Go to ER for evaluation



Click HERE to view Dr. O’Neil-Smith’s latest lecture on COVID-19

As the COVID-19 outbreak continues, please heed the following guidelines to protect yourself and those around you:

What can you do?
  • Prophylactic immune support: Get adequate nightly sleep. Maintain a healthy & balanced diet. HYDRATE! Routinely wash your hands with soap. Get fresh air and exercise (avoid gyms/fitness centers).
  • Immune boosters: Omega-3’s, Vitamin D3, Probiotics (supplements, kombucha, etc.), Transfer Factor (Multi-Immune & Plasmyc), Vitamin C, and Zinc
  • BE SOCIALLY RESPONSIBLE! If you believe you have been exposed and are displaying symptoms, avoid subjecting others to exposure by requesting a COVID-19 test (available in our office) AND self-quarantining for 14 days
  • Even if you appear symptom-free, contact with elderly and immunocompromised individuals may place them in severe danger; please be prudent and socially responsible until this outbreak resolves
  • Order food and other necessities through home-delivery services

Please continue to check this website for virtual updates.


  • 1172 Beacon Street Newton, MA 02461
  • Suite 401