You might be interested in information that was given to another person about Byberry records, you can see that post by clicking on the following.
He is also listed, at the age of 80 years old, in the 1940 Census at Byberry
Dear Ms. Sumner,
Thank you for posting your request on History Hub!
We suggest that you contact the Pennsylvania State Archives to obtain the patient records from Byberry Hospital; and the Pennsylvania Department of Health for the death certificate of your great uncle Biagio Tacconnelli.
You may wish to search Philadelphia State Hospital at Byberry and Encyclopedia of Greater Philadelphia | Byberry (Philadelphia State Hospital) for additional information and/or resources.
We hope this is helpful. Best of luck with your family research!