The data on 611 children with disabilities due to ear and mastoid diseases, which were examined in theFederal Governmental Institution «Main Bureau of Medical and Social Expertise in St. Petersburg» – the Bureau of the medical and social expertise of the pediatric profile for 2015-2016 are analyzed. Identified the main limitations of life, expert-significant domains of the international classification of functioning (ICF) have been studied. The carried out research allows to form modern approaches to expert-rehabilitation diagnostics of life limitations in disabled children due to ear diseases and mastoid process taking into account the international classification of functioning provisions.