May 23, 2023 15:18 Follow Anyone who can legally sign documents for your office. Related articles What is the Indiana Transparency Portal (ITP)? How can I gain access to the Web Portal? Who can have access? We are changing our National Provider Identifier (NPI). Do we have to fill out a new Web Portal enrollment? We have a billing company. Do we have to fill out the Web Portal form too? When do I need to obtain a PA?