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Peter McCullough

Peter Andrew McCullough is an American physician known for work in internal medicine and cardiology, and for his prominent role in public discussion of COVID-19.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Peter Andrew McCullough is an American physician known for work in internal medicine and cardiology, and for his prominent role in public discussion of COVID-19. He formerly served as vice chief of internal medicine at Baylor University Medical Center and as a professor at Texas A&M University. In 2025, the American Board of Internal Medicine revoked his internal medicine and cardiovascular disease certifications after previously recommending revocation over his COVID-19 vaccine-related claims.

Early life and education

McCullough was born on December 29, 1962. Sources list degrees from Baylor University, the University of Texas Southwestern Medical School, the University of Michigan, and Southern Methodist University.

Medical career

He worked as vice chief of internal medicine at Baylor University Medical Center and later as a professor at Texas A&M University. Professional profiles also describe him as an internist, cardiologist, and epidemiologist.

COVID-19 commentary

McCullough became widely known for public statements and publications about COVID-19, including early outpatient treatment and vaccine-related claims. Multiple sources describe these positions as contrary to scientific consensus or as misinformation.

Professional recognition and certification

Profiles credit him with extensive publication output and editorial roles in medical journals. The American Board of Internal Medicine ultimately revoked both his internal medicine and cardiovascular disease certifications in 2025.

Key facts

  • McCullough is an American former cardiologist and internist.
  • He held senior academic and hospital roles at Baylor University Medical Center and Texas A&M University.
  • He became widely known during the COVID-19 pandemic for public commentary on treatments and vaccines.
  • The American Board of Internal Medicine recommended revocation of his certifications in 2022, and later revoked both certifications in 2025.
  • He is associated with more than 1,000 medical publications according to professional profiles.
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Canadian context

McCullough is relevant to Canadian readers mainly through his high-profile public commentary on COVID-19, which was cited in broader international debates about vaccine and treatment misinformation.

Frequently asked questions

Who is Peter McCullough?
Peter McCullough is an American physician best known as an internist and cardiologist who became widely publicized during the COVID-19 pandemic.
What is Peter McCullough known for?
He is known for his medical career and for controversial public commentary on COVID-19 treatments and vaccines.
What positions did he hold?
He was vice chief of internal medicine at Baylor University Medical Center and a professor at Texas A&M University.
What happened to his board certifications?
The American Board of Internal Medicine recommended revocation in 2022 and revoked both his internal medicine and cardiovascular disease certifications in 2025.
What is his medical background?
Professional profiles describe him as an internist, cardiologist, and epidemiologist with training from several universities.
Is he still practicing medicine?
One professional profile lists him as an independent, practicing internist and cardiologist, but his board certifications were later revoked by ABIM.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/Peter_A._McCullough
    Supports: Birth date, career roles, and ABIM revocation background.
  2. European Society of Cardiology — https://esc365.escardio.org/person/784755
    Supports: Professional description, publication record, and medical background.
  3. ORCID — https://orcid.org/0000-0002-0997-6355
    Supports: Degrees and professional background.
  4. MedPage Today — https://www.medpagetoday.com/special-reports/features/113624
    Supports: ABIM certification revocation details.
  5. McGill University Office for Science and Society — https://www.mcgill.ca/oss/article/covid-19-medical-critical-thinking/dr-peter-mcculloughs-libertarian-medical-train-makes-pit-stop-east-palestine
    Supports: Context on COVID-19 misinformation claims and role at the Wellness Company.