Firstly, this information would be in paper records, as there were not computerized records at that time. Those papers would be stored in boxes, if they are even still retained. Hawaii state law only requires retaining records for 7 years. In some circumstances more, but the most would be 25 years after the last data entry, or after a minor attains majority. In either case, they may not still have them.)
Where do hospitals store boxes of records? Not in expensive and valuable hospital space. Most hospitals contract with a secure records company, such as Iron Mountain, or Access to store records offsite. Those records cannot be easily accessed - one has to request access, and have an authorized person sign off on the request.
Finally, anyone giving out information is liable for a large fine or a prison sentence.
Earth Frisk is going to have to back up those claims to be believable. They haven't done that.
Re: “...there were not computerized records at that time...”
Of course there were — especially in government agencies. They had the money and were early innovators.
You’re correct about Iron Mountain, where they probably have the original paper documents, and certainly microfiche/film copies — oh, and electronic media copies.