Narcissistic personality disorder (NPD) is a complex mental health condition characterized by grandiosity, a need for admiration, and a lack of empathy. While NPD is often discussed in psychological and psychiatric contexts, its broader public health implications and potential disability considerations remain understudied. This entry explores the public health repercussions of NPD, including its impact on interpersonal relationships, workplace dynamics, the healthcare system, and societal costs. Understanding the implications for both individuals and society is essential for developing effective interventions. Moreover, this entry addresses digital narcissism and social media use in young adults that may increase individualistic tendencies, potentially altering NPD prevalence. In conclusion, this entry highlights the gaps in disability recognition and advocates policy reforms to improve care access and reduce stigma.