Recent data show that drug overdose deaths in the U.S. were 10 percent higher in 2017 than 2016, with an almost 50 percent increase in those related to synthetic opioids. A new research paper points to a glimmer of hope in this otherwise bleak story: Medicare Advantage insurance companies seem to be doing a surprisingly good job at mitigating opioid abuse.

Medicare plays a larger role in the epidemic than many people may appreciate. The program is the largest single purchaser of opioids; it accounts for more than a fifth of prescription opioid spending and in 2017 alone spent more than $3 billion on these drugs. And use is relatively widespread: Almost a third of people receiving drug coverage through Medicare obtained an opioid prescription last year. Some research even suggests the expansion of drug coverage under Medicare's Part D is partially responsible for the problem, by reducing the cost of prescribed drugs to consumers (even if the people receiving the lower-cost prescriptions diverted the drugs to others).