Wearables Turn the World Into a Sleep Lab, and Insurers Are Watching the Bill

The Blue Cross Blue Shield Association analysis found a sharp rise in patients documented as having complex conditions. It argued there is a clear disconnect between medical coding and treatment, with no evidence of a matching change in the care delivered. TechCrunch reported the figure on 26 September 2026, citing the analysis and noting that the New York Times pointed to it as the latest sign that AI is pushing healthcare costs up.

That is the uncomfortable backdrop for a quieter, more technical shift in sleep and activity research. Consumer wearables are no longer just step counters. They are becoming the instruments that generate the evidence used to argue about who is sick, how sick, and who pays.

A Fitbit in every study

In April 2024, researchers at the University of Texas at Austin published a study in Nature Scientific Reports. They tracked 82 young adults with a wrist-worn activity tracker that recorded movement and heart rate, plus a smartphone app for self-reported well-being. Physical activity lengthened REM latency, the time it takes to enter REM sleep. The researchers said this may indicate that exercise helps consolidate deeper sleep stages before the transition into REM. The work replicated lab findings: low-intensity and moderate-to-vigorous activity was linked to deeper, more restorative sleep, and better sleep went with more energy and less stress the following morning.

"We've shown using a standard Fitbit that anyone could wear, not even an expensive scientific device, that it is actually sensitive to these sorts of sleep architecture measures, and in a way that's showing predictive results," said David M. Schnyer, a co-author and chair of the Department of Psychology.

The methodological point matters more than the sleep advice. Benjamin Baird, a research assistant professor of psychology and one of the authors, said lab studies are limited because a single night in an unfamiliar, clinical-type setting can be stressful, and you cannot watch people over time. That leaves questions about generalizability. Wearables sidestep the problem by monitoring people at home, at work and during daily activities over weeks and months.

That shift is global. ABC News reported on 24 September 2024 that when an earthquake hit New South Wales earlier that month, data scientists in Sweden detected a disturbance in sleep using data from the Sleep Cycle app. An above-average number of people in the surrounding area briefly woke up. Michael Gradisar, Sleep Cycle's head of science, told the ABC that sleep is one of the first things to go wrong in a person's health, calling it the canary in the mine. The company's data scientists also saw a rise in night-time coughing in New York about a week before confirmed Omicron cases, which Gradisar described as an early warning system.

Regulators start paying attention

The clinical line is blurring. In early 2024, Samsung's smart watch sleep apnoea detection system received approval from the US health regulator after an eight-month review. According to ABC News, it was the first consumer smart watch to clear that hurdle. Apple's smart watch received the same regulatory approval earlier this month, the ABC reported. Sleep apnoea may affect as many as a billion people worldwide, but it is under-diagnosed, and the conventional diagnosis requires a night in a sleep lab.

Danny Eckert, director of the Adelaide Institute for Sleep Health at Flinders University, told the ABC that a 2022 study he co-authored found up to half of single-night diagnostic studies for sleep apnoea, the current gold standard, misclassify severity. Single-night tests are hugely noisy and inaccurate, he said, and in-home monitoring now allows continuous measurement over weeks, months and years.

China is pushing the same hardware logic into its health system. Rest of World reported on 24 September 2026 that patients there book appointments through WeChat or Alipay and can chat with an AI avatar of a doctor about insomnia or diabetes. Ruby Wang, a physician and consultant, told Rest of World that in the UK and US tech is always an add-on to a rusty machine, whereas in China the digital rails are technologically enabled and society accepts that as normal. She said China's share of global drug out-licensing deals could reach as much as 60% this year, and that the March 2026 approval of Neuracle's NEO system was the world's first commercial approval of an invasive brain-computer interface medical device.

None of this settles the cost fight. Dr. Shiv Rao, founder of AI startup Abridge, told TechCrunch that AI could lead to a horrible dystopic future with bots fighting bots and agents fighting agents, but said it might also reduce tensions and cut costs. Luke Chalker, a senior vice president at BCBSA, resisted the framing of a battle, telling TechCrunch: "It's not a war. It's a completely one-sided blood bath," with insurers on the losing side.

The dossier does not say how much of the $942 million was tied to wearable data specifically. What it does show is that the same devices now used to study sleep architecture at population scale are also producing the documentation that insurers and hospitals argue over. The research case for wearables is getting stronger. The billing case is getting louder.