To schedule any appointment, please call us at 804.285.8206. Until we see you, please stay safe and thank you for being a part of the GSI family. Sincerely, The Physicians and Staff of Gastrointestinal Specialists, Inc. Gastrointestinal Specialists, Inc. offers comprehensive gastrointestinal care throughout Central Virginia.Online Bill Payment‧Physicians & Staff‧Office Locations‧Patient Portal‧Contact Us‧Billing Information.