Worker's Comp or NOT?

We had an employee who was on her 15 minute break at work (We don't require them to clock out for the 15 minutes) and she went out to her car. In the process of doing this, she tripped and fell landing on her shoulder. She went to ER after she got off work and it might be fractured. There are no adverse conditions such as ice, etc. Sidewalk is fine, she just tripped and fell. Would you consider this a Workman's Compensation recordable Accident? Anyone ever had this happen to them? I have called several SAFETY professionals and got a different opinion from every single one of them.