Sending the Request
To send your request to CHLA, attach your filled out Notice of Patient Demographic Change form, a form of ID (passport, driver's license, ID card, etc.), and a non-certified copy of your name/gender change court order to an email and send it to himrequest@chla.usc.edu.
My request took three days from submission to be processed, and I received an email telling me the change is complete.