there are many hospitals with an emergency room providing 24-hour medical services in rio de janeiro. these include:

state hospitals

hospital estadual albert schweitzer
at: rua nilópolis 329, realengo
tel: (21) 2299 7847 (and 7848 to 7865)

hospital estadual adão pereira nunes
at: rod. washington luiz (no number), br040 - km 109, jardim primavera, duque de caxias
tel: (21) 2777 5001

hospital estadual carlos chagas
at: rua general osvaldo cordeiro de faria 466, marechal hermes
tel: (21) 3390 0123 / (21) 2489 8499