The standards and process for changing one’s name and gender on a birth certificate varies from state to state. Look at the laws of the state in which the birth certificate was issued. The learn about the requirements in your state, visit Lambda Legal’s Comprehensive List or The National Center for Transgender Equality's Interactive Map.
Usually, you will need to obtain a court order name and/or gender marker change.
For name change only, submit the court order, old birth certificate, and a form (VS-23) need to be submitted to the Office of Vital Records of the state in which it was issued.
For gender marker change, most states require that a health care provider fill out a form or write a letter. The court order, original physician's letter, old birth certificate, and a form (VS-24) need to be submitted to the Office of Vital Records of the state in which it was issued.
For detailed information on the process in California, check out the Transgender Law Center's Guide, ID Please.
To change the gender marker on a California birth certificate, please see the template below: