Dr. Gordon is the Medical Director of Millennium Health Centers, Inc. - Medicine for the 21st century, in Encino, California. Dr. Gordon has been a consultant to the Medical Board of California in Endocrinology, Internal Medicine, and Alternative Medicine (1998 - present).

Originally residency trained and board certified in Family Medicine (1984), Dr. Mark L. Gordon continued his medical education in Clinical Orthopedics (1990), Cosmetic Dermatology (1993), and Sports Medicine (1995) prior to culminating in Interventional Endocrinology (1997) – a term which he coined in 2003.

In 2005, Dr. Gordon received his Pharmacist license (EXC 16111) from the State of California. After 15 years as a general consultant to the Medical Board of California, he was enlisted as a consultant in Endocrinology, Internal Medicine and Alternative medicine in 2015.

Dr. Gordon has been a strong advocate of preventative medicine through the optimization of neuroactive steroids and neurosteroids. He was instrumental in expanding the recognition of Traumatic Brain Injury (TBI) as a cause of hormonal deficiency in the hallmarked presentation on ESPN’s Outside the Lines (2007).

His first book, The Clinical Application of Interventional Endocrinology (2008), is recognized by his peers as a dissertation on the standards of care and assessment for Hormone Replacement Medicine. His academic standards and medical knowledge had been shared with medical students from USC Keck School of Medicine, where he held the position as Voluntary Associate Clinical Professor (1998-2015).

As medical director of CBS studios (2001-date), he has participated in studio projects in addition to outside projects with HBO, CBS, ESPN, CNN, and FOX News, as well as a number of international news outlets.

In 2004, Dr. Gordon recognized the association between traumatic brain injury causing both hormonal imbalances and neurobehavioral conditions. In 2015, he was invited to give his TBI lecture at UCLA under the late Dr. Stephen L. Coles.

Dr. Gordon is presently Medical Director of the Millennium Health Centers, Inc., in Encino CA. In 2010 he became the Medical Director of Education for Access Medical Laboratories of Jupiter, FL, helping to promote the newest technologies in laboratory science and the understanding of the relationship between the numerical results of a lab test and its implication to the health of the patient. In 2015,

Dr. Gordon released his newest book, Traumatic Brain Injury – A Clinical Approach to Diagnosis and Treatment, presenting the science of his experience treating all precipitating causes of traumatic brain injury in both active military, veterans, professional sports, and in the civilian population. Presently,

Dr. Gordon has joined with a few charitable organizations; Warrior Angels Foundation and Task Force Dagger, to provide services to members of the armed forces both active and veterans. In November 2018, Dr. Mark L. Gordon was awarded the Alan Mintz Award by the Age Management Medical Group for his unrelenting work to help veterans with TBI.

It was in early 2015, the Warrior Angels Foundation and Dr. Gordon teamed up to continue the fight against the status quo, and to disrupt and change the TBI patient care protocol for Veterans.