Professional Licenses Followup

Following up on my post about researching whether someone is licensed to work in a particular profession in Maryland, I've located a few more professions that were not listed in the original post. For taxi cab drivers, check out this site from the Maryland Public Service Commission. For professional solicitors see this page from the Office of the Secretary of State. For respiratory therapists and physician assistants use the same site used to search for physicians. Finally, for optometrists, use this site.