Records from St. Elizabeth Hospital are available at the National Archives in Washington DC (once they re-open for research). The following is from the Guide to Federal Records
418.4.1 Records of the Medical Records Branch
Textual Records: Records of cases, 1855-1941. Register of female patients, 1866-1933. Case files of patients, 1855-1981 (bulk 1855-1950). Records relating to Garcia antiluetic treatments, 1937-38. Case files relating to metrazol and insulin therapy, 1937-39, with index. Clinical notes relating to the serpasil geriatric project, 1954-55. Conference record books, 1920-22, 1929-30, 1936-38.
Dear Ms. Hunt,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located two series titled Registers of Cases, 1855 - 1963 which is digitized; Case Files of Patients, 1855 - 1950; and Records Pertaining to Investigations in the Records of St. Elizabeths Hospital (Records Group 418) that may contain the records you seek. For access to the non-digitized records, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at email@example.com.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!