Patients with disabilities are 11 times more likely to die from Covid-19 than their able-bodied peers. That’s a sobering statistic. And it’s why public health officials have prioritized these vulnerable patients for vaccinations.

Unfortunately, when it comes to non-Covid matters, society doesn’t always show the same concern. In fact, many states and private insurers are pushing for a “reform” that could deprive Americans living with multiple sclerosis (MS), cerebral palsy, and other disabilities of life-saving medicines.

The reform relies on a metric known as a “quality-adjusted...