Here in Massachusetts ambulance personnel are required to create a report for each individual they treat.
According to 105 CMR 170.345(B),
Each service shall maintain dispatch records, in either computer-aided (CAD) or handwritten form, and written patient care reports, for every EMS call including, but not limited to, cases in which no treatment is provided, the patient refuses treatment or there is no transport. Each patient care report shall be accurate, prepared contemporaneously with or as soon as practicable after, the EMS call that it documents. EMS personnel shall provide a verbal report to receiving staff at the time of patient transfer of care. Each written patient care report shall, at a minimum, include the data elements pertaining to the call as specified in administrative requirements of the Department. All EMS personnel on the ambulance or ambulances dispatched to the patient are responsible for the accuracy of the contents of their respective patient care reports, in accordance with their level of certification. In addition, an ambulance service that does not transport must include in the patient care report the reasons for not transporting including, if applicable, the signed informed refusal form from the patient(s). All baseline printouts from equipment used in the care of the patient, and those parts of printouts that correspond to clinical interventions or clinically relevant changes in the patient’s condition, shall be available as part of the patient care report
In criminal cases, such reports often contain important information about both defendants and alleged victims.
To obtain an ambulance report, defense counsel should file a motion pursuant to Mass.R.Crim.P. 17 which allows judges too issue summonses “command[ing’ the person to whom it is directed to produce the books, papers, documents, or other objects designated therein.”