A medication delivery device—;preferably designed and configured to be implantable for use inside of a human body—;secures excess tubing of a catheter to a pump housing. The tubing is received and retained in channels, whereby an excess extent of the catheter that is unneeded can be safely stored in an out-of-the-way position. The channels are defined in and integrally formed with the pump housing. Alternatively, the channels are defined in a catheter retention member that clips onto other otherwise attaches to the pump housing. In the alternative design, the catheter retention member may be provided separately from or provided with the pump and catheter.