Newborn and Infant Hearing Screening and Intervention Act of 1999 - Mandates grants or cooperative agreements to: (1) develop statewide newborn and infant hearing screening, evaluation and intervention programs and systems; and (2) provide technical assistance to State agencies to complement an intramural program and to conduct applied research related to newborn and infant hearing screening, evaluation, and intervention programs and systems. Requires the National Institutes of Health to continue a program of research and development on the efficacy of new screening techniques and technology. Mandates Federal coordination and collaboration with State and local agencies, consumer groups, national medical, health, and education specialty organizations, deaf or hard-of-hearing individuals and their families, qualified professional personnel, and related commercial industries. Authorizes appropriations.