Accessing Central Islip State Hospital Records

My grandfather was dropped off at a police on Christmas Eve of 1922 and never saw his mother again. The story has stuck with me for my entire life. As a kid, I couldn't imagine never seeing my mom again, and as a mom, I cannot imagine parting with my children. The extenuating circumstances must have been extreme, but they're remained a mystery nearly 100 years later. What we do know is that my great grandmother ended up at Central Islip State Hospital, and presumably died there, though no death certificate has been located. 

I've been trying to dig and uncover a bit more of the mystery- which sent me looking for her hospital records from Central Islip State Hospital. The hospital was originally opened in 1889 under the name New York City Farm for the Insane, and later became Pilgrim Psychiatric Center, which is still in operation today. 

Image from Abandon Online- click to see more pictures of Central Islip Psychiatric Center

All of Central Islip State Hospital records are located in the New York State Archives, series 20200. But, they are locked and sealed due to the New York State Mental Hygiene Law. In order to be granted access, one must write to a letter requesting disclosure to the Office of Mental Health (OMH) at:
 
Health Information Management Unit
Pilgrim Psychiatric Center
NYS Office of Mental Health
998 Crooked Hill Rd
West Brentwood, NY 11717-1087
 
In the letter, I’ll be including the probable admission time, why we believe she was a patient there, and proof that I am indeed her descendant. These types of records are incredibly personal in nature, even 100 years later, so if they are not able to disclose them, I am asking for a copy of a photo (if available) her place of residents, employment information, next of kin, and any visitor information that might be slightly less confidential.
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What do you think about the confidentiality and mental health laws as they pertain to genealogical research? Should records be freely available after 100 years? Or kept under lock and key? Tell me your thoughts in the comment section!