From the web the easiest way to search for a Patient is using the search bar, this is at the top of your DrChrono account anywhere you go. All you need to do is simply start typing the patient's name and select it from the list. This will take you into the patient's chart. You can also go to Patients > Patient List and find your patient there.
From the iPad, the process is very similar to the web. Tap the search icon ()on the and a search field will show up at the top. Type in a Patient's name and select the Patient. This will bring you into the Patient's chart on the iPad.