Banner Health, a provider of hospital services, has notified by mail 3.7 million people — including patients, health plan members, healthcare providers and customers at its food and beverage outlets — that their payment card and health plan data, among other information, may have been compromised.

The provider said Wednesday that it discovered on July 7 that cyberattackers may have gained access to computers that process payment card data at the food and beverage outlets at some of its locations. Payment cards that were used at these outlets at certain Banner Health locations from June 23 to July 7 this year may have been affected, the provider said. Card payments for medical services were not affected, according to the investigation.

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