Poland-based online doctor appointment booking startup DocPlanner has raised $20 million in its third round of funding. The latest round was led by new investors Target Global with participation from ENERN Investments and the European Bank for Reconstruction and Development (EBRD), via its venture capital investment programme.

DocPlanner has now raised $34 million in total and its previous investors include Point Nine Capital, Piton Capital, RTAventures, as well as noted angels like Lukasz Gadowski and Fabrice Grinda. DocPlanner raised $10 million in May 2015.

DocPlanner also announced that it had merged with its Barcelona, Spain-based competitor Doctoralia. DocPlanner says prior to the merger it attracted 8 million unique users each month, with 90 percent coming from Europe. While Europe is clearly its strongest market, the company said it was in 25 countries last year, including some in Asia and South America.

Doctoralia, meanwhile, had more than 9 million unique users every month, with traffic mostly coming from Spain, Brazil and Mexico. It's active in 20 countries though.

As a result the combined company expects to have 17 million unique users, paying customers in 20 markets and the biggest global database of physicians -- 5 million -- with 3 million registered patient users on the combined platform.

“We have the ambition to become the clear number one global online platform for healthcare. The focus now is on building a stronger global presence – bolstering positions in key markets (Poland, Turkey and Italy) and adding four to five high growth markets, either through greenfield or acquisition. The presence and usefulness of healthcare platforms is slowly getting recognized by doctors and patients in a growing number of countries,” Mariusz Gralewski, founder and CEO of DocPlanner said in a statement. “In our key markets we are actively growing the supply of doctor calendars available to patients online and are focusing on delivering a top quality experience for both sets of users.”