Dr. Adams: "Let's Get It On"

Dr. Adams has just walked into a Los Angeles County Courtroom to face one of his victims -- who sued him for malpractice and a botched surgery.

TMZ spoke to Dr. Adams about the death of Kanye West's mom, and he said, "I can not comment appropriately until I receive the coroner's report." The doc arrived, alone, in a black pinstriped suit and tie!

Speaking of appropriate, Jan's ringtone on his phone is Marvin Gaye's "Let's Get It On."