Tomball Regional Medical Center Enters Into Acquisition Agreement With Subsidiary of Community Health Systems, Inc. PR Newswire TOMBALL, Texas, July 28, 2011 TOMBALL, Texas , July 28, 2011 /PRNewswire/ — Tomball Hospital Authority (Authority), which owns and operates Tomball Regional Medical Center (TRMC), a nationally recognized provider of comprehensive healthcare services serving the greater Northwest Houston market, today announced that its board of directors has unanimously approved the sale of substantially all of the assets of TRMC to a subsidiary of Community Health Systems, Inc. (NYSE: CYH) […]