Maybe
The Centers for Disease Control and Prevention is investigating what could be the first case of novel coronavirus in the United States involving a patient who neither recently traveled out of the country nor was in contact with someone who did.
“At this time, the patient’s exposure is unknown. It’s possible this could be an instance of community spread of COVID-19, which would be the first time this has happened in the United States,” the CDC said in a statement
https://www.latimes.com/california/story/2020-02-26/california-coronavirus-case-could-be-first-spread-in-u-s-community-cdc-says