Computerworld — A top medical insurance executive on Wednesday downplayed the potential impact of services from Microsoft and Google that are aimed at helping users store and share their health records with providers.

Google Health went into beta on Monday. It follows the launch of similar efforts, such as Microsoft's Health Vault.

"I think anything we can do to kill the paper is good, and having health data stored in central places is helpful as long as we have good security and standards," said Ronald Williams, CEO of Aetna, at the Massachusetts Institute of Technology's CIO Symposium.

But software companies don't have an "interest in improving the system or looking for gaps in care," he said. "When the data goes there, it is really static and stored."

Williams argued that those efforts cannot compare to Aetna's in-house customer records portal, the CareEngine System, which launched in 2006.

He called the system Aetna's "secret sauce." It compiles member data from sources such as medical, pharmacy and lab claims, then compares it against a database of medical literature and research in an attempt to spot potential problems and need for additional care. The system generates alerts to patients and physicians regarding such findings.

Privacy concerns have been raised about Google Health because the company plans to link it with some of its other services. Google will keep individual health records private but may release "anonymous, aggregated" data, according to a spokeswoman.

Aetna conducts broad analysis of its customer data, such as tracking the way various conditions are being treated in geographic conditions, but "is not looking to use it in a commercial way," Williams said.

The Hartford, Conn. company had revenue of $27 billion in 2007 and serves more than 17 million medical plan members, according to its Web site.

A Google spokesperson responded to Williams' contention in a statement.

"We've always been strong supporters of competition, and we believe that any effort to help make health information more organized, accessible and useful is a good thing -- regardless of who's doing it," the statement said, in part. "This is the first version of Google Health, and it's only the beginning."

The service also includes APIs (application programming interfaces) with which developers can create additional online services, such as personalized news feeds, and plug them into Google Health, the statement said.

Microsoft did not immediately respond to a request for comment.