Plan 70/30 offers $4000 Coinsurance Maximum. (outofpocket max N/A).

Plan 80/20 offers $4100 Out-of-pocket Maximum. (coinsurance max N/A) 

Does that mean that if I get into an accident which requires $10000 in a year:

* Under Plan 70/30 **am I still on the hook for fees above $4000?**
* And under Plan 80/20 I am NOT liable for ANYTHING above $4100?