The article presents information about various medical and social characteristics of the population of the Samara region cities. The survey of respondents was held by the network commercial laboratory, which treatment rooms were opened simultaneously in several cities of the region. The conducted study allowed to compile a medico-social portrait of the customer of laboratory services of medical organizations. It was discovered that laboratory services of commercial laboratories are most commonly used by women (78.1%) between the ages of 18 to 40 years. It was revealed that 54.9% of all patient admissions were repeated, and 56.0% of the patients were tested on their own initiative. The initial application is male-dominated 56.2%. Geographically the most often service was provided in Togliatti city (63.8%). Most prone to doctor's recommendation, to apply for paid medical analyses are patients between ages of 18 to 50 years old. Based on the obtained data a set of measures was proposed aimed to improve the quality of medical laboratory services.