United States is the biggest market for the outsourcing industry, which is dominated by Tata Consultancy Services Ltd , Infosys Ltd and Wipro Ltd. It also accounts for 90 percent of all healthcare related contracts, which researchers Everest Group expect to more than double to about USD 68 billion in 2020 from nearly USD 31 billion two years ago, largely due to 'Obamacare'.

"In terms of technology maturity, other sectors like manufacturing, banking, are a lot more mature than healthcare," said Rajib Bhattacharya, head of a healthcare software unit that India's fifth largest outsourcing firm Tech Mahindra Ltd set up last month.

"I think it's a huge opportunity," he recently told reporters. Average revenue growth for India's top five outsourcing firms by market value is expected to slow to 13.3 percent year-on-year in the quarter that ended June 30 from 18.6 percent growth in the same year-ago period, Thomson reporters data shows.

The slowdown is largely due to banks, manufacturers and financial firms cutting down on IT spending amid uncertain prospects for the global economy. By contrast, US states have to upgrade healthcare programs and build online exchanges where buyers can evaluate and select service providers under Obamacare, creating outsourcing opportunities worth hundreds of millions of dollars.

Health care deals currently account for less than 10 percent of the sales of market leader TCS, which will be the first outsourcing firm to report first-quarter earnings on Thursday.