93000 Medicare required documention

For a place of service in an office visit im billing a 93000 12 lead with interpertation ---what does Medicare require as documentation? Does it need to be a seperate report in a seperate tab in the patient chart? Or is it ok if in the office visit note theres is 4 words or more to say ekg is normal or abnormal- normal pacer rhythm . I have noticed a former article but there is no specification. Thank you!