The Affordable Care Act (ACA) requires new private health insurance plans to cover many recommended preventive services without any patient cost-sharing. For adults, the required services are recommended by the U.S. Preventive Services Task Force (USPSTF), the Advisory Committee on Immunization Practices (ACIP), and the Health Resources and Services Administration (HRSA) based on recommendations issued by the Institute of Medicine Committee on Women’s Clinical Preventive Services. As new recommendations are issued or updated, coverage must commence in the next plan year that begins on or after exactly one year from the recommendation’s issue date. This tracker presents up-to-date information on the adult preventive services nongrandfathered private plans must cover, by condition, including a summary of the recommendation, the target population, the effective date of coverage, and related federal coverage clarifications. For more information, see the fact sheet Preventive Services Covered by Private Health Plans under the Affordable Care Act.