ROCHESTER — Mayo Clinic officials say a $1 billion project launched by the health care provider will combine all of its electronic health records into a single, upgraded computer system.

Mayo Clinic Health System sites switched to the new system by Wisconsin-based Epic Systems Corp. on Saturday. It allows all medical personnel involved to see information about a patient’s medications, allergies and health issues.

“By applying the world’s most forward-thinking technology and processes to our electronic health records and collaborative care systems, our experts will be even more connected in delivering the high-value care, research and education that Mayo is known for and patients deserve,” said Christopher Ross, a spokesman for Mayo Clinic.

Mayo Clinic Regional Vice President Dr. Timothy Johnson said the system will allow for better workflow on more than 200,000 patient records across multiple sites.

“For Mayo Clinic, this is absolutely a huge milestone,” he said.

The Mayo Clinic has built a regional training and command center for the new technology in Rochester. The 165,000-square-foot building will help train staff and facilitate the migration of electronic records onto the new system over the next year and a half, said Rhoda Fukushima Madson, a spokeswoman for Mayo Clinic.

About 7,000 Minnesota based-employees will need to be trained in the system in the coming months.

The Mayo Clinic’s Wisconsin locations are testing out a technology information system called the Plummer Project, which addresses the revenue cycle, network upgrades and security upgrades.

Minnesota sites are scheduled to adopt that upgrade in November.