The article describes the role and sphere of influence of social and professional communications in medical organizations. The distinctive features of communications on the modern market of medical services are revealed, the characteristics of the features of the communication space in the sphere of healthcare are given. The author formulated and presented the main dominants of the implementation of social and professional communications for medical institutions. There are the specifics of the sphere of medical services at various levels (legislative, legal, internally regulated, socially significant, technical), the specifics of the subjects of interaction and the established relations between them, established business practices, the specifics of the object of interaction, channels of interaction and terms of interaction in this classification.