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Dear Mr. Gallion,
Thank you for posting your request on History Hub!
The medical and Official Military Personnel Files (OMPFs) of enlisted men and officers of the U.S. Navy who were served during WWI are located at the National Archives at St. Louis (RL-SL). Please request his OMPF using a GSA SF 180 or by applying online at https://www.archives.gov/veterans/military-service-records/.
We hope this information is helpful. Best of luck with your family research!