Two California hospitals – Chino Valley Medical Center in Chino and Desert Valley Hospital in Victorville – have been attacked by hackers demanding a ransom.

The latest hit comes just a month after Hollywood Presbyterian paid hackers a $17,000 ransom to regain control over its computer systems and during the same week on the heels of ransomware attacks against Methodist Hospital in Henderson, Kentucky, and Ottawa Hospital in Ontario, Canada.

Both Chino Valley and Desert Valley are part of Prime Healthcare. Prime spokesperson Fred Ortega acknowledged the attack, according to reports, and said that neither hospital paid the ransom and no patient data was compromised.

[Also: Hollywood Presbyterian hack signals more ransomware attacks to come]

The recent spate of ransomware attacks has security experts predicting more to come in the immediate future.

“Organizations with a good defense-in-depth strategy, advanced detection capabilities and solid response and contingency plans will fare far better when attacked,” CynegisTek CEO Mac McMillan wrote in a February 23 article published on Healthcare IT News. “Make no mistake about it. Protecting information assets is a business issue and organizations that don't recognize this will pay for it.”

The FBI is amid ongoing investigations into Chino Valley and Desert Valley and a separate probe is underway concerning the attack against Methodist Hospital. 

Twitter: @HealthITNews