What you share in session is considered confidential and may not be revealed to anyone without your explicit written permission, except where the law states otherwise (such as a reasonable suspicion of child, dependent or elder abuse or neglect, if you present a danger to yourself, to others, to property, or are gravely disabled).
One other note should be added here: if you choose to submit a claim to your insurance company, you forfeit the confidentiality and privacy of your records. Most of the people I work with choose not to use insurance for this reason.