Disability is common in PH patients, and is related to several factors underlying their disease process, including physical and cognitive impairment, as well as impaired QoL. Objective statistics quantitating the nature and degree of disability in PH patients are lacking, and criteria for determination of disability fall short of accurately capturing the elements needed for disability determination. Patients, medical professionals, and the PH community at large should continue to advocate strongly for system-wide improvements in the disability determination process, while continuing to pursue methods aimed at reducing the influence of PH on physical and mental function. Finally, formal study of disability in PH should be undertaken to better define the nature and effect of PH on disability, and to have a better understanding of what needs to be done to improve the lives of PH patients.