Two of the biggest health systems in Texas signed a letter of intent to merge Oct.1, a commitment the companies believe will strengthen healthcare in Central Texas.

Baylor Scott and White Health and Memorial Hermann Health System are the two Texas nonprofits that will soon share the same brand. Both are founded as faith-based organizations, and with its combined goal, will serve Dallas, Austin, Central Texas, Houston and Temple.

Baylor Scott and White Health and Memorial Hermann Health System are...