WWW- “DR. Feelgood” has not only entered rehab, he’s lost his license. Dr. Marc Saginor, Hugh Hefner’s personal physician, was prominently featured in his daughter Jennifer’s memoir, “Playground: A Childhood Lost Inside the Playboy Mansion,” as a drug-dealing doctor to Playmates and an absent and unpredictable father. Now, besides going into rehab as Cindy Adams reported, Saginor faces federal criminal charges for possession of a semi-automatic weapon and has lost his license. A rep for Hefner said: “Dr. Saginor has not worked for [Hefner] in over a year.”