If it happens much more in US than in other countries - it contributes.
There's about 500 000 medical bankrupcies in US per year. That's huge.
Also - medical debt (not even bankrupcy necessarily) contributes significantly to homelessness:
https://publichealthpost.org/health-equity/medical-debt-home...
https://pubmed.ncbi.nlm.nih.gov/32513034/
> two-thirds [of homeless interviewed] reporting current medical debt. Almost half reported trouble paying medical bills for themselves or family members. Almost one-third believed medical debt was in part responsible for their current housing situation. More than half with medical debt incurred this debt while they were covered under insurance. People who had trouble paying medical bills experienced a more recent episode of homelessness 2 years longer than those who did not have such trouble, even after controlling for race, education, age, gender, and health status