Welcome to Pathways to Health

Pismo Beach Medical Center
2 James Way, Suite 101
Pismo Beach, CA 93449

(805) 295-6750 Main


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The Practice of David M. Marquis, DC, DACBN

For over 20 years Dr. David Marquis has assisted thousands of patients find solutions to acute and chronic conditions without the use or with minimal of drugs or surgery. Through a metabolic and neurological approach to a patient’s health conditions, not only can the causes be determined, but the patient can learn how to manage their own health and often without medication. This is the underlying goal of care in Dr. Marquis’ office. Finding solutions and empowering patients to take their health back and become non-dependent on the broken insurance driven medical paradigm that plagues our country today.

When working with patients it is often identified that their real problem is a result of an unrecognized neuro-metabolic issue. This means that they may have metabolic dysfunction such as Blood Sugar Imbalances, Auto-Immune conditions, Anemias, Food Sensitivities, Latent Infections, or simple Nutritional Imbalances which are complicating normal metabolism.

Dr. Marquis with his family at Pismo Beach.

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Purchase Supplements Online

It’s important to us that our clients take clean, high quality supplements to ensure their efficacy and maximize their results. For this reason, we’ve partnered with FullScript, the largest online natural supplement dispensary.

Follow the link below to set up your free account and start shopping.


Become a Patient!

Are you tired of just your symptoms getting treated? Are you looking for a correction once and for all? Then you have found the right place! Please give us a call or explore our site . . .

Read what some of our patients have had to say about their dramatic improvements as a results of their treatments.

Functional Medicine

Functional Medicine determines how and why illness occurs and restores health by addressing the root causes of disease for each individual.

A Functional Medicine model is an individualized, patient-centered, science-based approach that empowers patients and practitioners to work together to address the underlying causes of disease and promote optimal wellness. It requires a detailed understanding of each patient’s genetic, biochemical, and lifestyle factors and leverages that data to direct personalized treatment plans that lead to improved patient outcomes.

By addressing root cause, rather than symptoms, practitioners become oriented to identifying the complexity of disease. They may find one condition has many different causes and, likewise, one cause may result in many different conditions. As a result, Functional Medicine treatment targets the specific manifestations of disease in each individual.

We Are Different!

If you are on this website, odds are you or someone you care about is frustrated with their health! We do things differently here. This is not a high volume clinic with a revolving door for patients.

Dr. Marquis’ unique approach assures his patients are:

  • Educated as to what caused their problem.
  • In possession of a concise and well-defined treatment plan to correct their condition.
  • Empowered with knowledge of what they can do to prevent or minimize the possibility of the situation occurring in the future.
  • Initial Patient appointments are at least an hour for and 30 minutes for follow-ups.


Even prior to the specialty becoming a known entity Dr. Marquis had studied and practiced in the field of Functional Medicine and Integrative Medicine. For over 20 years he has trained extensively in the use of a systems oriented approach to resolve chronic health conditions. His office incorporates genetics, standard and advanced blood chemistry, food sensitivity and allergy testing, along with a complex evaluation of lifestyle and environmental factors which all influence the development of disease. This form of care has widely become known as Functional Medicine. It addresses the underlying cause of disease allowing him to provide answers to long standing inflammatory conditions, neurodegenerative and auto-immune disorders.

In addition to his degree in Biology and his Doctorate, Dr. Marquis is the only Board Certified Clinical Nutritionist in the San Luis Obispo County. He also holds certifications in Botanical Medicine, Class IV Laser Therapies, Manipulation Under Anesthesia, Interactive Metronome Therapies and is currently pursuing another Diplomate in Functional Neurology. As such his services are encompassed under the umbrella of Neuro-metabolic care which is the blending of the best of Brain Based Therapies and Clinical Nutrition.

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