With FHMS offices located in Jamestown, Mayville, and Westfield, we're able to provide our quality medical support to families across Western New York. If you have any questions regarding our services, insurance information, or policies, please don't hesitate to contact us today! Patient Portal. Insurance Info. Jamestown Offices. Mayville ...Patient Portal‧Jamestown Locations‧Mayville Office‧Services‧Administration‧Happy Halloween From Fhms.