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This material may not be published, broadcast, rewritten, or redistributed. ©2026 FOX News Network, LLC. All rights reserved. Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by Factset. Powered and implemented by FactSet Digital Solutions. Legal Statement. Mutual Fund and ETF data provided by LSEG.

Marc Siegel

Marc Siegel

Marc Siegel, M.D., the Senior Medical Analyst for Fox News, is also a Clinical Professor of Medicine and a practicing internist at NYU Langone Medical Center. As the medical director of Doctor Radio on SiriusXM, Dr. Siegel has interviewed top experts on the COVID-19 pandemic, including the directors of HHS, NIH, CDC, FDA, NIAID and AMA.

Dr. Siegel is the author of six books. His most recent book, "The Miracles Among Us: How God’s Grace Plays a Role in Healing", debuted at #1 on both the New York Times and Publisher’s Weekly bestseller lists. Additional books include, "COVID: The Politics of Fear and the Power of Science," as well as "False Alarm: the Truth about the Epidemic of Fear," "Bird Flu: Everything You Need to Know about the Next Pandemic," and "Swine Flu: the New Pandemic," which was profiled by Publishers Weekly. He has also written columns that have appeared in The Los Angeles Times and The New York Daily News. His first book was the novel, "Bellevue."

Dr. Siegel has been at Fox News since 2008, when he was hired as a medical contributor. He has worked for the network as an analyst and as a reporter and writer for FoxNews.com. Notable interviews have included President Donald Trump, former President George W. Bush, former Vice President Dick Cheney, two Health and Human Services secretaries, and U.S. senators, as well as the first exclusive interview with a survivor of the Boston marathon bombing. 

Dr. Siegel traveled to the National Quarantine Unit at Nebraska Medicine in February 2020 to interview the team of scientists and the Diamond Princess passengers who contracted COVID-19, and warned the world about the coming pandemic.

Dr. Siegel is a member of the board of contributors at USA Today. He is also a columnist for FoxNews.com, The Hill, and the Wall Street Journal. He wrote a weekly column for the Los Angeles Times for six years, "The Unreal World," which examined TV and movies for medical accuracy. 

Prior to that, the doctor wrote a weekly medical news column for the New York Daily News' health section.

Siegel graduated from SUNY Buffalo School of Medicine & Biomedical Sciences and completed his residency training at the New York University Medical Center.

Follow him on X @drmarcsiegel.

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HHS decertifies organ procurement network over harvesting allegations
22 hours ago

HHS decertifies organ procurement network over harvesting allegations

Fox News medical analyst Dr. Marc Siegel provides details on the Trump administration's move to decertify Kentucky's Network for Hope after allegations of harvesting organs from active patients.

HHS decertifies Kentucky organ donation agency following near-fatal error
1 day ago

HHS decertifies Kentucky organ donation agency following near-fatal error

Fox News senior medical analyst Dr. Marc Siegel details Health and Human Services Sec. Robert F. Kennedy Jr. pulling the accreditation of a Kentucky organ procurement organization over patient safety violations.

Daily marijuana use tops cigarettes and alcohol, new report says
4 days ago

Daily marijuana use tops cigarettes and alcohol, new report says

Fox News senior medical analyst Dr. Marc Siegel joins ‘Fox & Friends’ to discuss the health risks associated with marijuana and the CDC’s warning about invasive mold infections.

GLP-1 medications tested by VA to treat alcohol abuse amid national blood shortage
4 days ago

GLP-1 medications tested by VA to treat alcohol abuse amid national blood shortage

Fox News senior medical analyst Dr. Marc Siegel discusses VA testing GLP-1 drugs like Ozempic to treat alcohol use disorder on 'Fox Report.'

Limiting sugar in early childhood linked to lower dementia risk
6 days ago

Limiting sugar in early childhood linked to lower dementia risk

Fox News senior medical analyst Dr. Marc Siegel joins 'Fox & Friends Weekend' to discuss a new study suggesting low sugar intake before age two leads to a reduced risk of developing dementia.

Research suggests GLP-1 drugs may help curb alcohol abuse
July 31, 2026

Research suggests GLP-1 drugs may help curb alcohol abuse

Fox News senior medical analyst Dr. Marc Siegel discusses a new Virginia trial examining whether GLP-1 drugs can reduce alcohol misuse and breaks down the 'cyclospora skinny' trend on 'America's Newsroom.'

Dr. Fauci's pleading the Fifth sparks criticism
July 29, 2026

Dr. Fauci's pleading the Fifth sparks criticism

Fox News senior medical analyst Dr. Marc Siegel analyzes Dr. Anthony Fauci's appearance at a Senate hearing about COVID-19 on 'The Story.'

Measles cases surge ahead of back-to-school season
July 25, 2026

Measles cases surge ahead of back-to-school season

Fox News senior medical analyst Dr. Marc Siegel discusses the increase in U.S. measles cases on ‘Fox & Friends Weekend.’

William Shatner, daughter Melanie reveal cancer battles
July 24, 2026

William Shatner, daughter Melanie reveal cancer battles

Senior medical analyst Dr. Marc Siegel joins 'America's Newsroom' to discuss the cancer diagnoses for TV legend William Shatner and his daughter, Melanie.

Biohacker Bryan Johnson claims he's cloned himself as newborn
July 22, 2026

Biohacker Bryan Johnson claims he's cloned himself as newborn

Senior medical analyst Dr. Marc Siegel joins 'Fox & Friends' to discuss biohacker Bryan Johnson's claim that he cloned himself as a newborn.

Glucose-monitoring AI ring makes historic debut
July 20, 2026

Glucose-monitoring AI ring makes historic debut

Fox News senior medical analyst Dr. Marc Siegel joins 'Fox & Friends' to discuss the release of the ACTXA Core Smart Ring, a new AI-wearable for non-invasive glucose monitoring.

Dr Siegel discusses health risks from wildfire smoke and lettuce parasite
July 19, 2026

Dr Siegel discusses health risks from wildfire smoke and lettuce parasite

Dr. Marc Siegel, Fox News senior medical analyst, discusses health risks associated with Canadian wildfire smoke and the Cyclospora parasite found on lettuce.

Dr Siegel discusses health effects of Canadian wildfires and parasitic outbreak
July 18, 2026

Dr Siegel discusses health effects of Canadian wildfires and parasitic outbreak

Fox News senior medical analyst Dr. Marc Siegel discusses the health impacts of Canadian wildfire smoke, including short-term respiratory issues and long-term risks. He also addresses the Cyclospora outbreak.

Sen Lindsey Graham’s sudden death caused by aortic dissection
July 13, 2026

Sen Lindsey Graham’s sudden death caused by aortic dissection

Fox News senior medical analyst Dr. Marc Siegel analyzes Sen. Lindsey Graham’s cause of death and concerns of a cyclosporiasis outbreak on ‘Fox & Friends.

DC medical examiner finds Lindsey Graham suffered an aortic dissection
July 12, 2026

DC medical examiner finds Lindsey Graham suffered an aortic dissection

Fox News senior medical analyst Dr. Marc Siegel discusses D.C. medical examiner releasing preliminary findings into the death of Sen. Lindsey Graham and Sen. Mitch McConnell providing a health update on ‘The Big Weekend Show.’

Mitch McConnell reveals reason for hospitalization, Senate absence
July 12, 2026

Mitch McConnell reveals reason for hospitalization, Senate absence

Fox News senior medical analyst Dr. Marc Siegel discusses Sen. Mitch McConnell's, R-Ky., update on his health nearly a month after his hospitalization on ‘The Big Weekend Show.’

Lindsey Graham's sudden death prompts medical questions, political reactions
July 12, 2026

Lindsey Graham's sudden death prompts medical questions, political reactions

Fox News senior medical analyst Dr. Marc Siegel addresses the sudden death of Sen. Lindsey Graham, R-S.C., discussing the emergency response timeline, family history of heart issues and more on 'Fox Report.'

Vicious stomach bug spreads across US
July 10, 2026

Vicious stomach bug spreads across US

Dr. Marc Siegel discusses the spread of the Cyclosporiasis stomach bug, the World Health Organization's report on increasing cancer rates by 2050, and research on 'super mover' adults who reduce cognitive decline through fast walking.

Michigan Senate Democratic candidate Abdul El-Sayed
Opinion
July 10, 2026

DR MARC SIEGEL: A Senate candidate's medical title sparks a debate voters shouldn't ignore

Abdul El-Sayed supports Medicare for All but has never treated patients, raising questions about his claim to be a physician in the Senate race.

Optimal night of sleep is 6 to 7 hours, expert explains
July 7, 2026

Optimal night of sleep is 6 to 7 hours, expert explains

Fox News senior medical analyst Dr. Marc Siegel advises against obsessing over sleep duration, citing research suggesting 6-7 hours is optimal.

Rare tick-borne virus cases reach record high as tick season peaks
July 6, 2026

Rare tick-borne virus cases reach record high as tick season peaks

Fox News senior medical analyst Dr. Marc Siegel discusses the surge in Powassan tick-borne virus cases, prevention methods and treatments. The rare virus, often carried by deer and mice, has seen a record number of reported cases this year.

DEA begins marijuana rescheduling hearing
June 29, 2026

DEA begins marijuana rescheduling hearing

Fox News senior medical analyst Dr. Marc Siegel discusses the DEA’s marijuana hearings and concerns about the drug’s addictive nature and unproven medical benefits on ‘Fox & Friends.’

Parents turning to GLP-1 drugs for kids as obesity rates soar
June 27, 2026

Parents turning to GLP-1 drugs for kids as obesity rates soar

Fox News senior medical analyst Dr. Marc Siegel discusses the alarming rise of childhood obesity on 'Fox & Friends Weekend' and why some parents are turning to GLP-1 medications like Wegovy to remedy the trend.

Staggering fentanyl amounts hit streets as experts express concerns
June 24, 2026

Staggering fentanyl amounts hit streets as experts express concerns

Fox News senior medical analyst Dr. Marc Siegel joins 'America's Newsroom' to discuss the growing fentanyl crisis and the whistleblowers speaking out on the issue.

Full-body MRI scans grow in popularity
June 22, 2026

Full-body MRI scans grow in popularity

‘Fox & Friends’ hosts discuss the growing popularity of full-body MRI scans for early disease detection. Fox News senior medical analyst Dr. Marc Siegel shares his concerns about the technology.

New research casts doubt on cannabis benefits, cites mental health risks
June 20, 2026

New research casts doubt on cannabis benefits, cites mental health risks

Fox News senior medical analyst Dr. Marc Siegel discusses new research on modern marijuana’s high THC potency and increased mental health risks on ‘Fox & Friends Weekend.’

High-potency cannabis linked to mental health risks, expert warns
June 20, 2026

High-potency cannabis linked to mental health risks, expert warns

Senior medical contributor Dr. Marc Siegel highlights new research on modern marijuana.

Tulsi Gabbard releases documents on Fauci, alleged COVID cover-up
June 19, 2026

Tulsi Gabbard releases documents on Fauci, alleged COVID cover-up

Tulsi Gabbard releases documents on Fauci, alleged COVID cover-up

Mangione to assert 'psychiatric defense' in murder trial
June 17, 2026

Mangione to assert 'psychiatric defense' in murder trial

Fox News senior medical analyst Dr. Marc Siegel and Fox News legal analyst Kerri Urbahn discuss developments in Luigi Mangione's murder trial, where his team plans to assert a psychiatric defense.

Florida sues TikTok over allegedly addictive features
June 16, 2026

Florida sues TikTok over allegedly addictive features

Fox News senior medical analyst Dr. Marc Siegel discusses Florida’s lawsuit against TikTok and examines the potential mental health effects of social media use on ‘Fox & Friends.’

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