Idiopathic Parkinson disease (IPD) affects multiple aspects of a person’s daily functioning. The current study examined the effects of a multidisciplinary intervention program, including recreational therapy (RT) and speech therapy, among individuals with IPD or PD plus conditions over 16 weeks. The study included six participants with IPD and a participant with progressive supranuclear palsy (PD plus condition). Participants with IPD attended a weekly LOUD Crowd® program consisting of different speech and cognitive activities. In addition, all seven participants attended an RT intervention focusing on fall prevention education and implementing balance, strength, and endurance routines. Results indicated improvements in dynamic balance, reduced fall risk, cognition, swallowing, and voice-related outcomes. In conclusion, a multidisciplinary intervention program is beneficial for individuals with PD or PD plus conditions.