Not true. At least in Oregon, once your child reaches the age of 13, they are allowed (required) to have private time with the medical provider where a parent is asked to leave, and they limit parents ability to see prescriptions for birth control as well as some mental health information/prescriptions. There is considerable latitude given to the physicians, who are able to block a parents access to this information.
Additionally, in the online system our provider has, we are not allowed to get access to his prescriptions due the above mentioned state law.