About Nedwin P. Landreneau, Jr., MD. Nedwin Paul Landreneau, Jr., MD is a family medicine doctor and primary care doctor who practices at Acadiana Family Physicians, Inc., APMC located at 427 Heymann Blvd in Lafayette, LA 70503 (Lafayette Parish). Dr. Nedwin P. Landreneau, Jr. has 15+ years of experience in family medicine. Education.