15 Musim
331 Episode
ER - Season 9
- Tahun: 2009
- Negara: United States of America
- Aliran: Drama
- Studio: NBC
- Kata kunci: chicago, illinois, hospital, doctor, surgical operation, emergency room, medical drama
- Direktur: Michael Crichton
- Pemeran: Maura Tierney, Parminder Nagra, Linda Cardellini, Scott Grimes, David Lyons, Angela Bassett