William F. Barrow II

Since President Obama took office, the federal government has poured more than $29 billion into health information technology and told doctors and hospitals to use electronic medical records or face financial penalties. But some tech companies, hospitals and laboratories are intentionally blocking the electronic exchange of health information because they fear that they will lose business if they share information on patients with competing providers, administration officials said. In addition, officials said, some sellers of health information technology try to “lock in” customers by making it difficult for them to switch to competing vendors.

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