DocPlanner, a Polish appointment booking software company, just raised $16.8 million (15 million euro) in new funding from Enern Investments, Target Global, and One Peak Partners. Existing investors Enern and Target Global led the round. This brings the company's total funding to $51 million (46 million euros).

According to a release from the company, the new funds will support DocPlanner's expansion into the Latin American market. Over the next six months DocPlanner will open offices in Brazil and Mexico. The funding will also be used to support continuing marketing and sales activities in Europe.

The company is one of the a number of companies around the world working on appointment booking software to sell to providers. Consumers can use this service to search for doctors, read ratings from other users, and book appointments with nearby medical professionals. ZocDoc is perhaps the best known in the United States. Lybrate is building a similar offering in India, and in Singapore's DocDoc provides a similar service. There's also France's DoctoLib, which raised $28 million in January, and Luxembourg-based online booking platform Doctena, which acquired German competitor Doxter in November.

DocPlanner is used by 20 million patients, processes 340,000 bookings every month, and lists more than 5 million healthcare professionals with a total of 2 million patient reviews. It operates in 30 countries.

When the company raised its last funding round in June 2016 it also announced a merger with Spanish appointment booking company Doctoralia. That acquisition is connected to the current expansion plans, since Doctoralia had a much larger presence in Brazil and Mexico.