Not infrequently there are notes in patients charts that only care providers can see. This practice is becoming frowned upon in some circles however, in lieu of more transparency. I imagine it being really useful for certain scenarios (e.g. mental illness or documentation a sensitive domestic relationship, where you wouldn't want a potentially abuse family member to see comments about their behavior in a relative's chart).
You don't really own your medical record, also doctors add notes to your medical record that you may not like. For example your medical record may say that you don't follow up with medication, abuse drugs, have psychiatric/personality problems, etc. which patients could be sensitive about.
And trying to exercise that right by using tools you have access to as an employee of your own health care provider rather than going through the proper channels that any other patient goes through to request such access (which involve the employer having documentation of the request, and auditability as to the purpose of any access involved in serving that request), is likely to violate internal procedures designed both to protect PHI and assure that all access is within job function.
