This article presents a study of the severity of neurotic symptoms in patients with neurotic disorders and in healthy people. Analysis of the results allowed us, with the help of mathematical modeling methods, to identify patterns of personality related to the presence of different neurotic disorders (neurotic disorder, adjustment disorder or neurosis-like disorders). As a result of cluster analysis for various types of neurotic disorders most characteristic clusters were revealed. The clusters can be regarded as prognostically unfavorable personality types.