I spent half that time in Critical Care (much of that on a ventilator, a small amount sedated), and most of the rest in a specialist neuro-rehab unit. I would have died otherwise.
Fortunately it cost me nothing - Thank Bevan for the NHS - but if I were in the US I imagine I would be financially crippled!
According to https://nchstats.com/average-cost-of-hospital-stays-in-us/ the average cost for inpatient care in the United States is 3,025 dollars.
4 months of 30 days multiplied by 3,025 is equal to 363,000 dollars without insurance.
That is an entirely believable number to me.