99487 represents complex chronic care management (CCM) services, which are a specialized subset of non-face-to-face evaluation and management services provided to patients with multiple high-risk chronic conditions. To accurately report this code, the billing practitioner must ensure the patient has at least two or more chronic conditions that are expected to persist for at least 12 months or until the patient's death. These conditions must place the patient at a significant risk of death, acute exacerbation, or functional decline. Unlike standard CCM (represented by 99490), complex CCM (99487) necessitates medical decision making of moderate or high complexity. Furthermore, it requires either the establishment of a brand-new comprehensive care plan or a substantial revision of an existing one. The service is defined by 60 minutes of clinical staff time performed under the direction of a physician or other qualified health care professional during a calendar month. The scope of these services is broad, encompassing systematic assessment of the patient's medical and psychosocial needs, coordination with various specialty providers, management of transitions of care, such as following a hospital discharge, and ensuring the patient has 24/7 access to the care team for any urgent health concerns. This service is designed to support patients who require more intensive coordination than standard CCM provides. The documentation must clearly state the time spent by staff, the specific nature of the care coordination, the complexity of the medical decision-making process, and the details regarding the care plan's status. It is a critical component for managing medically fragile populations and reducing readmission rates by providing continuous oversight and resource management for individuals with multi-system diseases.