A general range in the United States, without stent placement, is between $4,000 and $6,000, but it can vary widely.
That might only be the surgeon, er, interventional cardiologist's fee.
In my case, five years ago, with one stent deployed, the total cost was ~$31,000, of which I had to pay a very large deductable. And...like you I did not stay overnight. Total stay was about 11-12 hours.