Introduction: Integration of health information systems based on a common language is essential to exchange data with the system. The study aimed to eliminate the existing problem in the integration of information system with electronic health records system through providing a conceptual model of laboratory reporting system, using the Unified Modeling Language and enable information system developers to design their services based on this model and connect to Electronic Health Record System to send their laboratory reports.

Methods: In this applied-descriptive, cross-sectional study, conducted during the first half of 2015, purposive sampling was used to select 95 employees of Rajaee Heart Center laboratory in Tehran. Data were collected using a questionnaire the validity and reliability of which were measured using content validity and test-retest, respectively. Data analysis was done through descriptive statistics using SPSS software version 21. Visual paradigm was used to design a conceptual model.

Results: Data related to reports such as, demographic, administrative, clinical, insurance, anesthesia and laboratory, observation and interpretation were suggested as minimum data set for radiology report. Identified data needs, based on processes and user description, were used to draw use case diagrams based on which activity, class, state, sequence and collaboration diagrams were designed.

Conclusion: Laboratory reports in Electronic Health Record System have a crucial role in diagnosing and managing clinical problems; therefore, providing a conceptual model for laboratory reporting system can eliminate the current problem of data sharing between these systems and electronic health records system.