The Agency for Healthcare Research and Quality noted that during 2009, a total of 1 percent of Americans represented nearly 22 percent of healthcare costs.

The figure meant that for every $5 spent, $1 of that was used to treat one out of 100 patients, the report noted. This showed a total of $1.26 trillion was spent on that 1 percent during 2009, averaging out to a total of $90,061 per person per year. The 2009 figure was higher than 2008, as that year's most expensive 1 percent represented 20.2 percent of the total healthcare costs.

Despite the high figures, this was down from 1996, when the 1 percent was billed 28 percent of the total expenditures for healthcare in the United States, the source noted.

"[There was] some decrease in this concentration at the upper tail of the expenditure distribution," said Steven Cohen and William Yu, research experts for AHRQ.

Continued increases in healthcare industry expenses could mean health insurance rates could be rising, overall. This may mean consumers could benefit by comparing rates to see if there is a less expensive option available.