Which PBM specializes primarily in providing healthcare-related services and pharmacy benefits management?

The selection of ESI as the answer highlights its role as a prominent pharmacy benefit manager (PBM) that focuses on integrating healthcare-related services with pharmacy benefits management. ESI, or Express Scripts, is known for its extensive expertise in managing prescription medications, negotiating drug prices, and optimizing pharmaceutical care for patients. This specialization allows them to improve overall healthcare outcomes while effectively controlling costs for both patients and payers.

In contrast, the other options do not fulfill the same criteria. Transparent Rx is a PBM that emphasizes transparency and cost savings but may not be as widely recognized or comprehensive in services as ESI. Humira and Revlimid are specific pharmaceutical products rather than pharmacy benefit managers. Humira is an inflammatory disease treatment, while Revlimid is used in the management of certain types of cancers. These products do not provide the range of services associated with PBM functions. Thus, ESI stands out as the leading entity specializing in the integration of healthcare-related services and pharmacy benefits management.