Joanna: Thank you Dean! Thank you for bringing me here and making a wife, and a mother and WHY DID you DO that?
Dean Proffitt: You jumped my bones the first night we met.
Annie: We did it on the first date?
Dean Proffitt: Couldn't call it a date really, we just did it in the parking lot of the 7-Eleven.
Annie: I'm a slut.
Dean Proffitt: What did you say?
Annie: Nothing.
Dr. Norman Korman: You're overwrought, Grant. I want you to take a Valium. Here, take one of mine.
Doctor at Hospital: Look, if it were up to us, we would be glad to give her to you, but she's right we are gonna need some verification.
Joanna Stayton/Annie Proffitt: I just... ate a bug.
Answer: This is just speculation, but since he knew what hospital she'd been in, he likely went there and asked who'd claimed her and where they lived. It wouldn't be too difficult.