The son is a military man. He received a combat wound. The previous diagnosis during the evacuation was a contusion (ABT), this diagnosis is indicated on the form 100. On the recommendation of the doctors, he was evacuated to a hospital for treatment. After treatment in the hospital, the son received a discharge, in which the diagnosis of ABT is not indicated even as a preliminary one. Due to discrepancies in the diagnoses, he was denied sick pay. Can I, as a mother or a son, personally make a written request with the requirement to provide an explanation with which previous diagnosis my son was admitted to the hospital, on the basis of which medical tests he was removed and why it was not indicated in the discharge? How to send it correctly to guarantee a response from the hospital.