Extremity arterial study

I would like to know what a report for an arterial study of lower extremities looks like (93923) I have a report that reads with only ankle brachial index and I don't know what to look for on a report of MULTIPLE LEVELS. What are the other levels and what should the report read out? I am new coding the arterial studies and I don't seem to find anything regarding the levels.
Thank you

re: Extremity arterial study

http://www.radiologytoday.net/archive/rt061509p8.shtml;

http://qhr.knowledgebase.co/article/ultrasound-code-93922-and-93923.html;

http://www.wpsmedicare.com/part_b/policy/active/local/l28586_cv033.shtml