A leadless neurostimulation (NS) device and method to manufacture the device is described. The leadless NS device has a first sub-unit (FU) and a second sub-unit (SU) separately and individually hermetically sealed. The FU and SU also include a flexible inter-connect that physically interconnects the FU and SU to one another. The leadless NS device also includes electrodes provided along the exterior surface of at least one of the first and second sub-units. The electrodes are configured to interface with nervous tissue in an epidural space of a patient and deliver stimulation pulses along the nervous tissue. At least partially housed within the FU includes a first subset of a power source, an energy management components, an electronics sub-system and telemetry component. Further, a second subset of the power source, energy management components, electronics sub-system and telemetry component are at least partially housed within the SU.
