TIRR Memorial Hermann | 10,548 followers on LinkedIn. A National Leader Among Rehabilitation Hospitals TIRR Memorial Hermann (The Institute for Rehabilitation and Research), is recognized among the leading rehabilitation hospitals in the country. For the 36th consecutive year, TIRR Memorial Hermann is recognized among America’s best rehabilitation hospitals, topping the list in Texas and ranking No. 2 in the nation according to U.S. News & World Report's "Best Rehabilitation Hospitals” in America for 2025-2026.