Joseph James Herdman MD 1088 US Hwy 1 Ste 2407 Media, Pennsylvania, 19063 Company Name: REGIONAL GASTROENTEROLOGY ASSOCIATES OF LANCASTER, LTD. Doctor Category: Internal Medicine Profile Let this business know you found them on Main Line Today's Online Directories. Locations Media 1088 US Hwy 1 Ste 2407 Media, Pennsylvania 19063 Claim/Edit Listing