In March 2022 the Kaiser Family Foundation released a report on medical debt in the US.  Part of their findings:

We find that 23 million people (nearly 1 in 10 adults) owe significant medical debt. The SIPP survey suggests people in the United States owe at least $195 billion in medical debt. Approximately 16 million people (6% of adults) in the U.S. owe over $1,000 in medical debt and 3 million people (1% of adults) owe medical debt of more than $10,000. Medical debt occurs across demographic groups. But, people with disabilities, those in worse health, and poor or near-poor adults are more likely to owe significant medical debt. We also find that Black Americans, and people living in the South or in Medicaid non-expansion states were more likely to have significant medical debt.

Here is the link to the full report:

https://www.healthsystemtracker.org/brief/the-burden-of-medical-debt-in-the-united-states/