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Business	12 Months Ended
Business	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business	Business Diversified Healthcare Trust is a real estate investment trust, or REIT, organized under Maryland law, which owns senior living communities, medical office and life science properties and other healthcare related properties throughout the United States. As of December 31, 2025, we owned 298 properties located in 33 states and Washington, D.C. As of December 31, 2025, our owned properties include: 221 senior living communities, including independent living (including active adult), assisted living, memory care and skilled nursing facilities, or SNFs, with approximately 24,500 living units; 67 medical office and life science properties with approximately 5.6 million rentable square feet; and 10 wellness centers with approximately 812,000 square feet of interior space plus outdoor developed facilities. As of December 31, 2025, we also owned an equity interest in each of two unconsolidated joint ventures that own medical office and life science properties located in five states with an aggregate of approximately 2.2 million rentable square feet.