Medical documentation is a record of clinical procedures and their success and the basis for quality control of every medical facility. Discharge summary (DS) is unique and uniform document that is given to every patient who was treated in medical facility. Discharge summary is important because it contains essential informations that specialist sends to general practitioner about patient's treatment in the hospital. Despite the importance of the discharge summaries, in daily practice for now there are no rules and guidelines concerning the content of DS. Writing of DS is not standardized among medical facilities. The aim of this graduation thesis was to analise medical documentation and to evaluate the quality, quantity and distribution of data in DS at „Clinic for head and neck surgery“ at University Hospital Dubrava. As the sample were used 100 DS. For the analysis was chosen every twentieth DS from period of 01.01.2013 to 31.12. 2013. from the Hospital Information System. Every DS was assessed for the adequacy of information about diagnoses, past medical history, status of the patient, treatment, decursus morbi, recommendations and instructions for next check up. The results showed that informations were optimaly written in: 85 % DS about decursus morbi, 76 % DS about check up, 58 % DS about treatment 56 % DS about reccomendations, 27 % DS about diagnoses and 15 % DS about medical history and status of the patient. In the discussion, it is explained why certain parts of DS are given more attention when surgeon is writing it, and why small percentages of representation of certain information does not mean poor quality of DS. Finally, the results led to conclusion that there is a need to develop templates, recommendations and guidelines for writing DS in order to raise their quality.