It'd be real interesting to see if MSP has rejected a training exemption for someone from a uniformed service that isn't the armed forces in submitting a DD214. I'd put odds on MSP waiving them through.
I don't believe that the DD214 is used for US PHS commissioned corps or the NOAA commissioned corps. In 2020 the US PHS started issuing DD214's with permission of the DOD to use the DD214 form.