Mark Crislip

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Mark Crislip
Mark at QED 2014
Born (1957-04-25) April 25, 1957 (age 62)
ResidencePortland, Oregon
Alma materUniversity of Oregon (B.S.)
Oregon Health & Science University (M.D.)
Known forScientific skepticism
AwardsPodcast Award
Scientific career
FieldsInfectious diseases
InstitutionsAdventist Medical Center, Legacy Good Samaritan Medical Center, Legacy Meridian Park Medical Center, Legacy Mount Hood Medical Center

Mark Alden Crislip (born April 25, 1957) is an infectious disease doctor in Portland, Oregon[1] and chief of infectious diseases at Legacy Health hospital system.[2][3] Crislip hosts the QuackCast podcast.[4] He also produces two other podcasts, has written and edited several books, and regularly writes for medicine-related blogs. He is a co-founder of the Institute for Science in Medicine as well as a co-founder and the current president of the Society for Science-Based Medicine.


Crislip was born in Cleveland, Ohio. He attended the University of Oregon from 1979 to 1983, where he earned a Bachelor of Science degree in physics. He then earned a Doctor of Medicine (MD) degree at the Oregon Health & Science University School of Medicine in 1983. He completed an internship and residency at Hennepin County Medical Center in Minneapolis in 1986, followed by a fellowship at Harbor–UCLA Medical Center.[5] He is currently a board-certified infectious disease specialist at several medical centers in the Portland area.[6]


Crislip is the producer and host of three podcasts: QuackCast, Gobbet o' Pus, and PusCast.

Each episode of QuackCast features Crislip delivering a monologue about a topic related to medicine, usually a critique of an alternative medicine practice or set of beliefs. He was inspired to create his own science-based medicine show after listening to the popular podcast Slacker Astronomy.[7] The first episode of QuackCast was released on 5 May 2006, and other episodes have been released intermittently since then.[8] The podcast has won three Podcast Awards in the Health/Fitness category, for the years 2009, 2010, and 2011.[9]

Crislip has been producing the Gobbet o' Pus podcast since 2009. The show features short discussions of interesting cases he has encountered in his medical practice and other topics of interest to infectious disease specialists. A new episode is released every few days.[10][11]

PusCast (also known as Persiflagers Infectious Disease PusCast) is a bimonthly review of the infectious disease literature. Crislip has been producing this podcast since November 2006.[12]


Mark Crislip at the QED Conference 2014

Crislip is an editor of and writes biweekly posts for the Science-Based Medicine blog. There, he writes on investigating the claims of alternative medicine.[13] He is the co-editor, along with Steven Novella and David Gorski, of a 12-volume series of Science-Based Medicine Guides, based on posts from the Science-Based Medicine blog.[14]

He also posts several times a week on a blog for Medscape called Rubor, Dolor, Calor, Tumor.[15] He compiled selections from his Medscape blog into two e-books titled Puswhisperer: A Year in the Life of an Infectious Disease Doc[16] and Puswhisperer Part Deux: Another Year of Pus.[17]

He is also the author of a medical app for Android and iPhone called Infectious Disease Compendium: A Guide to Infectious Diseases.[18]

Skeptic magazine published an article by Crislip in 2008 titled "Near Death Experiences and the Medical Literature," in which he criticized a Lancet article that reported on near-death experiences without considering all the physiological factors that may have accounted for patients' subjective experiences.[19]

Other activities[edit]

Mark Crislip (left) with David Gorski at The Amaz!ng Meeting 2011

Crislip is the president and co-founder of the Society for Science-Based Medicine, an organization that seeks to educate medical professionals and the general public about the importance of basing medical practices on science. It also advocates for laws that support the use of science in medicine. The organization's website features a wiki-based repository of material about questionable medical practices from Dr. Stephen Barrett's extensive Quackwatch website.[15]

He is a founding fellow of the Institute for Science in Medicine, a non-profit educational and policy institute that promotes science-based medical practices.[20]

Several organizations that promote science and skepticism have invited Crislip to give lectures about alternative medicine and the anti-vaccine movement. He has spoken at The Amaz!ng Meeting three times, most recently in 2013.[21] In June 2010 he gave a talk called "The Vaccine Pseudo-Controversy" for the Center for Inquiry Portland.[22] In November 2013 he spoke at a meeting of Oregonians for Science and Reason on the topic of "Supplement, Complementary and Alternative Medicine Myths."[23] He was also a featured speaker at the QED Conference in Manchester, England in April 2014.[24]

Crislip is credited with an oft-cited quote of integrative medicine: "If you integrate fantasy with reality, you do not instantiate reality. If you mix cow pie with apple pie, it does not make the cow pie taste better; it makes the apple pie worse."[25][26][27]


Crislip has been on the Top Docs list published by Portland Monthly magazine several times,[18] most recently in 2014.[28] U.S. News & World Report listed him as a Top U.S. Physician in 2012. The residents at his hospital also named him "Attending Most Likely to Tell It Like It Is."[18]


  1. ^ Painter, Kim (17 July 2016). "'Dry needling' for pain therapy is under scrutiny". USA Today. Retrieved 27 July 2016.
  2. ^ Bodman, Susannah (5 October 2014). "2013-14 flu season: The misery continues for Oregonians". The Oregonian. Retrieved 27 July 2016.
  3. ^ Terry, Lynne (3 January 2014). "Flu victims filling up Portland-area emergency rooms as season gets early start". The Oregonian. Retrieved 27 July 2016.
  4. ^ Jolley, Chuck (23 October 2013). "Jolley: Five Minutes with Vani Hari and why does she matter". Drovers. Retrieved 27 July 2016.
  5. ^ "Dr. Mark A. Crislip, MD". HealthGrades. Health Grades, Inc. Retrieved 4 February 2014.
  6. ^ "Dr. Mark Crislip, Infectious Disease Specialist". U.S. News & World Report. Dyer, Kerry F. Retrieved 4 February 2014.
  7. ^ "Skeptiles: Episode 32 – Dr. Mark Crislip, MD". Skeptiles Podcast. 23 April 2013. Archived from the original on 13 January 2014. Retrieved 4 February 2014.
  8. ^ Crislip, Mark. "Quackcasts (mp3)". Retrieved 20 January 2014.
  9. ^ "Podcast Awards 2005–2012". Podcast Awards. 2013. Archived from the original on 7 December 2013. Retrieved 20 January 2014.
  10. ^ Nickson, Chris (2010-06-13). "A Gobbet O' Pus". Life in the Fast Lane. Retrieved 17 February 2014.
  11. ^ Crislip, Mark. "A Gobbet O' Pus". Retrieved 17 February 2014.
  12. ^ Crislip, Mark. "Puscast". Retrieved 18 February 2014.
  13. ^ Flam, Faye (1 April 2015). "How To Avoid Being Fooled By Health Claims: A Few Simple Rules". Forbes. Retrieved 27 July 2016.
  14. ^ "Mark Crislip's Books". Goodreads. Goodreads Inc. Retrieved 23 February 2014.
  15. ^ a b Sturgess, Kylie (11 January 2014). "Episode One Hundred And Seventy Four – On Art And Science – Carbon Dating And The Society for Science-Based Medicine". Token Skeptic. Retrieved 8 February 2014.
  16. ^ Crislip, Mark (2012). Puswhisperer: A Year in the Life of an Infectious Disease Doc. Pusware LLC.
  17. ^ Crislip, Mark (2012). Puswhisperer Part Deux: Another Year of Pus. Pusware LLC.
  18. ^ a b c "Mark Crislip Biography". Smashwords. Smashwords, Inc. Retrieved 18 February 2014.
  19. ^ Crislip, Mark (2008). "Near Death Experiences and the Medical Literature". Skeptic. 14 (2).
  20. ^ "ISM – Our Fellows". ISM Website. Institute for Science in Medicine. Retrieved 24 February 2014.
  21. ^ "Speakers". The Amaz!ng Meeting 2013. James Randi Educational Foundation. Retrieved 23 February 2014.
  22. ^ "The Vaccine Pseudo-Controversy". Meetup. Retrieved 18 February 2014.
  23. ^ "Speakers". Oregonians for Science and Reason. Retrieved 18 February 2014.
  24. ^ "Guest Speakers". QED: Question, Explore, Discover. North West Skeptical Events Ltd. Retrieved 23 February 2014.
  25. ^ Gorski, David H (1 September 2013). "Complementary therapies in radiation oncology: mixing cow pie with apple pie?". Focus on Alternative and Complementary Therapies. 18 (3): 133–135. doi:10.1111/fct.12029. ISSN 2042-7166.
  26. ^ Osborne, Hannah (20 August 2014). "Clinical Trials of Homeopathy 'Essentially Test Whether Magic Works', Experts Say". International Business Times. Retrieved 28 July 2016.
  27. ^ Carroll, Robert T. "Integrative medicine". The Skeptic's Dictionary. Retrieved 28 July 2016.
  28. ^ "Who from Legacy made the local "top docs" list?". eDoc Talk News. Legacy Health. February 2014. Retrieved 18 February 2014.

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