I also thought it was implied to be a HIPPA violation for Fenton to contact his mom. But the only questions I actually remember being asked about HIPPA were in redirect, when she was asked if it was a violation for her to continue to contact, email, call, etc. the patient, after he has told her he did not want to continue as her patient. I believe it was, but she wasn't sure (which struck me as funny).
I don't really know what the law states, but Feinstein seemed pretty sure it wasn't a HIPPA violation, and I'm thinking the defense wouldn't have let it go without a following up. JMO, MOO, etc.