The International Classification of Functioning, Disability and Health (ICF) generates health information and allows identification of the impact on the functionality in different clinical situations, for example in drilling by firearms (PAF). Objective: The aim of the study was describe the impact of violence by firearms on adolescent and young hospitalized in a referral hospital in trauma based in the international classification of functioning, disability and health. Method: Descriptive, cross-sectional, quantitative, conducted from June to December 2014, in Fortaleza-CE, Brazil. The sample consisted of 231 participants of both genders and aged 12 to 24 years. Applied a summary list of ICF in two moments, the admission and discharge. Results: The most altered categories of Activity and Participation component at admission were mobility (72.27%), interactions relationships (65.4%) and self-care (37.8%); Body component and respiratory functions were (26.71%), and sensory pain (25.35%), voice and speech (20.1%), mental (13.26%) and neuromusculoskeletal (11,04%). At discharge, the most altered categories of Activity and Participation component were interactions relationships (64.5%), mobility (36.79%) and self-care (29.29%); and the Body Functions component were sensory and pain (23.38), voice and speech (16.8%), mental (13.26%), neuromusculoskeletal (10.45%), and respiratory system (5.05%). The categories related to mobility and breathing, were those with the highest percentages of improvement in high, while the sensory functions and activities related to interpersonal interaction showed the lowest percentage of improvement. Conclusion: This classification made it possible to trace a feature profile of these individuals and encode information by CIF, detecting the risk of functional impairment at admission and discharge, decisive for the resolution of the clinical realities.