You can learn a lot of information from taking a tour of a medical institution. Find out whether KEM Hospital is open to the public while you are in the area.
You'll have sightseeing choices galore in Parel. KEM Hospital is a good place to start here, but there are numerous other worthwhile attractions to discover. Gateway of India, Siddhi Vinayak Temple, and Mt. Mary Church are not far from the health care institution and will round out your day nicely.