By MICHAEL MILLENSON

“The New Yorker House Style Joins The Internet Age” announced the magazine’s daily newsletter under the byline of Andrew Boynton, whose appropriately old-fashioned title was “Head of Copy.” Among the alterations Boynton acknowledged readers might feel “long overdue,” were “Internet” becoming “internet,” “Web site” consolidating to “website” and “cell phone” becoming “cellphone.” Other quirky spellings (teen-ager, per cent, etc.) were deliberately retained.

But what about “health care” vs. “healthcare”?

A New York Times interview described Boynton as “tight-lipped” about the style changes, which came as the publication celebrated its 100^th anniversary year. When I nonetheless sought to discover whether a descriptor central to a massive chunk of the U.S. economy was more like a cellphone or a “teen-ager,” the magazine graciously responded.

“’Health care’ is our style,” a spokesperson wrote me in an email. “There has not been any discussion of diverging from this.” 

Not even a discussion? This was shocking news! But as I dug deeper, it seemed to me that the choice of the one-word versus two-word term often sent an underlying signal about the evolution of not just language, but of health care as both a profession and an industry.

Debating Evolution

Back in 2012, after I dived into the “health care vs. healthcare” debate for The Health Care Blog, my friend and colleague, the determinedly data-driven David Muhlestein, PhD, JD, accused me of ignoring language evolution by insisting on the “two words” usage. He eventually presented me with Google searches showing that the ratio of uses of the one-word to the two-word term ineluctably indicated “health care” was going the way of “Web site.”

When I solicited a 2025 update, Muhlestein obliged with a Google trends graph tracing relative usage since 2004.

 Apart from a brief time that “health care” was more prevalent as discussion of the Affordable Care Act dominated the news, the preference for “healthcare” has steadily strengthened. “As of now, people use the one-word version more than twice as often as two words,” Muhlestein wrote in an email. 

He added, “You can’t predict how language will evolve, you just have to go with what it is, and for the U.S., healthcare is definitely going to one word.”

Perhaps. But even a cursory qualitative analysis suggests a more nuanced picture than volume alone provides. After poking into the preferences of publications, corporations, the U.S. government and others, I decided that a 2022 April Fool’s column in Health Affairs actually provided a rough guide to understanding many usage decisions.