==== Front Innov Aging Innov Aging innovateage Innovation in Aging 2399-5300 Oxford University Press US 10.1093/geroni/igaa057.277 igaa057.277 Abstracts Session 2860 (Poster) Long Term Care I: Policy and Economics AcademicSubjects/SOC02600 Exploring the Complexities of Quality Measurement in Assisted Living in Washington State Ham Carolyn 1 McAvoy Cathy 2 Gantz Roger 2 Schwartz Lindsay 3 1 Washington State Department of Health, Olympia, Washington, United States 2 Washington State Department of Social and Health Services, Olympia, Washington, United States 3 American Health Care Association/ National Center for Assisted Living, Pittsboro, North Carolina, United States 2020 16 12 2020 16 12 2020 4 Suppl 1 Program Abstracts from The GSA 2020 Annual Scientific Meeting “Turning 75: Why Age Matters”84 84 © The Author(s) 2020. Published by Oxford University Press on behalf of The Gerontological Society of America.2020This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.Abstract In Assisted Living (AL) choice and quality of life are highly valued by residents. Prior research has found many interrelated components contribute to AL residents’ experiences of quality. There are 543 licensed AL facilities in Washington state, with 33,830 licensed beds; in 2019, resident cost per year ranged from $44,000 to $78,000. In 2018, the Washington Legislature identified a need for consumer access to unbiased information on AL quality and directed the Department of Social and Health Services (DSHS) to form a workgroup on quality measures. The workgroup consists of representatives from state agencies, AL provider associations, advocacy organizations, AL providers and AL residents. To inform the workgroup, DSHS conducted a study of AL quality measures. Five statewide programs were identified and analyzed in 10 categories. The WA workgroup then assessed a series of measures across six domains: community participation and quality of life; consumer satisfaction; equity, diversity and inclusivity; informed choice and decision making; person-centered planning; and, resident safety. The workgroup assessed and chose to adopt CoreQ, a satisfaction measure developed by the American Health Care Association/National Center for Assisted Living (AHCA/NCAL) and endorsed by the National Quality Forum (NQF). In evaluating potential measures of quality, workgroup members weighed regulatory, industry, provider, consumer and family perspectives. Outcomes of this process include assessment of AL quality measurement in other states, selected measures for Washington and key insights into relative prioritization of quality domains by different stakeholder types.