Which of the following refers to a health care delivery model that focuses on comprehensive, holistic care provided where the patient lives

Preferred provider organizations (PPOs) are a type of managed care plan that offers a network of healthcare providers. While PPOs allow for some flexibility in choosing providers, they primarily focus on cost management rather than delivering holistic care in the patient's own environment. This model does not emphasize the comprehensive, patient-centered approach that characterizes the patient-centered medical home.

Health maintenance organizations (HMOs) are another form of managed care that requires members to use a network of doctors and hospitals. While HMOs aim to provide comprehensive health services, they often limit patient choice and do not necessarily focus on providing care in the patient’s home environment like a patient-centered medical home does.

The Agency for Healthcare Research and Quality (AHRQ) is a federal agency aimed at improving the quality, safety, efficiency, and effectiveness of healthcare. It does not represent a healthcare delivery model; rather, it focuses on research and policy to enhance healthcare services, lacking the direct patient care emphasis found in a patient-centered medical home.