According to the Oxnard Fire Department, the incident was reported at 9:43 a.m. near the intersection of West Gonzalez Road and Victoria Avenue, just outside the city limits.
The pilot "self-extricated" from the helicopter before firefighters arrived at the scene and extinguished the grass-fueled blaze, the tweet said. The single patient was transported to a hospital.
A spokesperson for the Ventura County Fire Department said the pilot suffered a leg injury and possibly and an ankle injury.
The grass fire burned about half of an acre.