What: Amazon is set to purchase One Medical for 3.9 billion dollars as it moves further into health care services.

Why it is important: One Medical’s mission has been to make healthcare more accessible and affordable through in-person, digital and virtual care services by allowing healthcare providers across the US to integrate its technology and enable patients to schedule appointments, renew prescriptions and access health records online.

Amazon Health Services sees the potential to reinvent the health care industry by using its size and platform. The company has purchased One Medical for 18 dollars a share in an all-cash transaction, including net debt.

Amir Dan Rubin will remain as CEO of One Medical.

Amazon Health Services expansion