With the stock markets sagging, gas prices increasing, and the economy ailing, doctors, dentists and hospitals are fighting to stay out of the red. Experts say it'll likely be a while before their higher costs are passed on to consumers, because salaries and other contracts are negotiated at intervals over the year. With medical inflation already running at 4.5% this year, compared with 4.1% for overall consumer prices, the rising costs will inevitably creep into patients' bills, experts say.