Yes. Any time the hydraulic line is cut or opened to air, you will need to re-bleed your remote. Bleeding your remote lever and line removes air that may become trapped in the system once the line is opened.
For remote bleed instructions check out our Remote Hose Replacement and Remote System Bleed manual or our Remote System Bleed video.
NOTE: Reverb seatposts must be bled with a RockShox bleed kit and Reverb Oil. Do not use SRAM brake bleed syringes as Reverb Oil and DOT 5.1 brake fluid are not compatible. This can cause irreversible damage to components. Be sure to store your Reverb bleed kit separately from your SRAM brake bleed kit to avoid contamination.