Hamblin is a writer and senior editor at The Atlantic magazine. He hosts the video series If Our Bodies Could Talk, for which he was a finalist in the Webby awards for Best Web Personality. He is a past Yale University Poynter Fellow in journalism, and he has lectured at Harvard Medical School, Wharton Business School, Columbia Mailman School of Public Health, and SXSW, among others.

His writing and videos have been featured in/on The New York Times, Politico magazine, Bon Appétit, Comedy Central, NPR, BBC, MSNBC, New York, and The Awl, among others. Time named him among the 140 people to follow on Twitter, Greatist named him among the most influential people in health media, and BuzzFeed called him "the most delightful MD ever," though he is not as delightful as William Carlos Williams.

After medical school at Indiana University, he did three years of residency before joining The Atlantic to develop a health section and, at least for now, work entirely in media. More on that at Columbia Journalism Review, Journal of the American College of Radiology, and Capital New York. He's based in Brooklyn.