Murphy, a Democrat, said at a news conference in Newark that there have been no confirmed cases of the virus in the state.
The number is 1-800-222-1222 and is being staffed 24 hours a day by the state's poison center. The state Health Department has set up a website with information as well. It's reachable at nj.gov/health.
The coronavirus outbreak in Wuhan has killed more than 100 people and sickened thousands.
Murphy also said the state is working closely with the Centers for Disease Control and Prevention and will provide updates as warranted.
China has cut off access to Wuhan and 16 other cities to prevent people from leaving and spreading the virus further.