Who Is Mark Geier? Age, Biography and Wiki
Mark Geier was born on May 3, 1948. He was an American physician who gained notoriety for his controversial medical practices, which eventually led to him being stripped of his medical license in later years. Throughout his life, Geier was involved in discussions around autism and vaccinations, contributing considerably to the ongoing debates in these fields. Sadly, Mark Geier passed away on December 25, 2025, leaving behind a complex legacy in the realm of medicine and public health.
| Occupation | Geneticist |
|---|---|
| Date of Birth | May 3, 1948 |
| Age | 76 Years |
| Birth Place | Washington, D.C., U.S. |
| Horoscope | Taurus |
| Country | U.S |
| Date of death | 20 March, 2025 |
| Died Place | Jupiter, Florida, U.S. |
Popularity
Mark Geier's Popularity over time
Height, Weight & Measurements
While specific details about Mark Geier's height and weight are not extensively documented, he was known to maintain a professional appearance throughout his career. As a public figure, he was often seen in tailored suits, symbolizing his professional standing within the medical community.
At the time of his death he was a self-employed geneticist and along with his son David, he operated several organizations from his private address in Maryland, including the Institute for Chronic Illness and the Genetic Centers of America.
As a professional witness he testified in more than 90 vaccine cases, in support of the view that there is a clear link between thiomersal and autism. His credibility as an expert witness was criticized during many proceedings before the Special Masters.
In a 2010 decision, the presiding legal authority wrote, "In summary, I conclude that all of the Geier epidemiologic studies are not reliable, and cannot be accorded any weight."
Family, Dating & Relationship Status
Details about Mark Geier's family are relatively private, with limited information available on his relationships. During his lifetime, Geier was reported to be married, but there is little public information concerning his wife or any potential partners. His intimate relationships remained largely undisclosed, aligning with his preference for maintaining privacy.
Geier's scientific work has also been criticized; when the Institute of Medicine reviewed vaccine safety in 2004, it dismissed Geier's work as seriously flawed, "uninterpretable", and marred by incorrect use of scientific terms.
In 2003, the American Academy of Pediatrics criticized one of Geier's studies, which claimed a link between vaccines and autism, as containing "numerous conceptual and scientific flaws, omissions of fact, inaccuracies, and misstatements". In January 2007, a paper by the Geiers was retracted by the journal Autoimmunity Reviews.
New Scientist reported that the supposed institutional review board (IRB) that Geier claimed approved his experiments with autistic children was located at Geier's business address and included Geier, his son David and wife, a business partner of Geier's, and a plaintiff's lawyer involved in vaccine litigation.
The Maryland State Board of Physicians referred to it as a "sham IRB" that did not meet the requirements of state or federal law.
Net Worth and Salary
At the time of his passing, Mark Geier's net worth was estimated to be modest, primarily influenced by his controversial career as a physician. After losing his medical license, his earnings dramatically fluctuated, predominantly stemming from his speaking engagements and limited private practice. His financial status highlighted some of the repercussions faced by professionals in his field following public scrutiny and regulatory actions.
Career, Business and Investments
Mark Geier’s career was marked by his involvement in the controversial field of vaccine research and autism. Despite holding a medical degree, Geier's practices led to significant ethical debates, which ultimately culminated in the revocation of his medical license. His business ventures post-license revolved mainly around public speaking and authoring materials related to his viewpoints on medical practices. These activities occasionally placed him at the center of legal discussions concerning the dissemination of false medical information.
Social Network
Mark Geier maintained a presence on various social media platforms where he engaged with followers on topics linked to health and medicine. His social network activity often reflected his unyielding beliefs on vaccine safety and autism, attracting a polarizing audience that both supported and criticized his stances.
Education
Mark Geier completed his medical education at a reputable institution, earning a Doctor of Medicine (MD) degree. His academic background laid the foundation for his early career in medicine, although his subsequent actions and views diverged significantly from conventional medical practices. Geier's education played a role in shaping his controversial theories and contributed to his initial acceptance in the medical community before facing significant backlash.
In conclusion, Mark Geier's life and career displayed the complexities involved in navigating the medical field, especially concerning contentious subjects like vaccines. His passing in 2025 marks the end of a tumultuous chapter in medical history, highlighting the realities of professional accountability and public health discourse.
Geier worked at the Laboratory of General and Comparative Biochemistry, National Institutes of Health in the 1970s and 1980s as a student researcher (1969–1970), research geneticist (1971–1973), staff fellow (1973–1974), on the professional staff (1974–1978), and as a guest worker (1980–1982).
He then examined vaccine safety issues, with scientists, scientific institutions, and judges criticizing this body of work as "tainted by faulty methodology".
