[1] In 1914, a group of physicians obtained a charter for a hospital in the home of Dr. Hyde West in Woodstock, Illinois.

In the early 1990s, health planners in McHenry County consolidated efforts among the two hospitals and physicians in the area.

[1] In 1995, Centegra Health System was formed when a new building named Memorial Medical Center was built in Woodstock, Illinois.

Centegra Health Bridge Fitness Center was also built in Crystal Lake, Illinois.

In 2015, a 40-bed Behavioral Health unit was opened within Centegra Hospital — Woodstock, and continues to operate under Northwestern Medicine.