Meet Dr. Dave Marquis

Dr. David Marquis is skilled in the Functional Medicine approach to evaluation and care of complex and chronic health concerns. He has a focused interest in neuro-degenerative and neuro-developmental conditions including Autism Spectrum, TBI, Parkinsonian Tremors, Dementia, Alzheimer’s, and CTE, and also has 20+ years of experience supporting patients with common metabolic conditions including endocrine-related disorders of thyroid, diabetes, and sex hormone imbalances. He is a board certified Chiropractor, has a Diplomat focused in Clinical Nutrition from the American Clinical Board of Nutrition and is currently focused on credentialing in a second Diplomat in Functional Neurology.

Dr. Marquis continuously advances his knowledge with over 200 hours annually of post-doctorate education. He is an accomplished public speaker and writer and teaches classes locally as a recurring guest lecturer. He regularly provides free educational lectures throughout the community via Prevention On Purpose.

Personally, Dr. Marquis is a proud father of 4 and has been happily married for over 25yrs. Outside of work, he loves to surf, camp, read, spend time with his family, and play guitar. Dr. Marquis is actively involved in his community, donating his time to various organizations such as, Boy Scouts of America, Central Coast Follies, the Still Frothy Billabong Surf Contest, and provides support to several sports teams throughout the Five Cities area. Additionally, for the past 20 years, he has been a volunteer Sunday school teacher as well as at Early Morning Seminary for local youth and high school students.

Learn more about the organizations Dr. Marquis is involved in:

Connects volunteers with local organizations. Dr. Marquis has worked on variosu community projects like park renovation (we have done Ramona park in Grover and a ton of work up at Lake Lopez as well as the Nipomo Regional Park)

Arroyo Grande High School:

Dr. Marquis provides financial support to a variety of sports. 

Five Cities Youth Basketball League:

A youth recreational basketball league for the Arroyo Grande, Grover Beach, Pismo Beach, Shell Beach and Oceano area.

Still Frothy – Billabong:

Non-Profit surf contest which provides scholarships to local youth and college students

Central Coast Follies:

A Dance Group which does an annual performance to support research into Parkinson’s Disease

Prevention On Purpose:

POP is a community enterprise made up of local business professionals and entrepreneurs committed to serving the community through educational seminars and workshops that focus on proactive prevention