So, you are saying that mental illness diagnosis family info is unavailable after 7 years? Even in the cases where it may be genetically inherited, such as the 25%-50% for schizophrenia, and the family needs to know for early intervention? Do you know if this practice is common?
I should note that NARA has provided info on one mental hospitalization from a Florida VA hospital at St. Augustine back in the 30s - I have copies. In this case the diagnosis was dead wrong that the man was delusional, hysterical &c, the man died painfully from extensive bone cancer in his hip and femur according to the coroner's autopsy. His wife needed info later for a veteran's widow's pension, and again because of needing his blood type, AB with Rh factor in the matter of one child AB blood type with serious illness.