What are "ancillary services" in health insurance?

Ancillary services refer to the range of additional healthcare services that support the primary treatment of patients. These services play a crucial role in the overall healthcare system by enhancing the effectiveness of primary medical care. For instance, ancillary services may include laboratory testing, imaging services like X-rays and MRIs, physical therapy, and prescription drugs. Such services complement primary care, helping to diagnose conditions, monitor treatment responses, and provide necessary rehabilitation.

In this context, primary treatment focuses on the core medical interventions provided by healthcare providers, while ancillary services provide the necessary support that allows these primary interventions to succeed more effectively. This distinction is what establishes the correctness of the answer, as it accurately reflects the supportive nature of ancillary services within the health insurance framework.