Propeller Health announced today that it completed a $21.5 million Series C financing round.

According to a release, the funds will be used to expand the company’s digitally guided therapy platform and modernize the management of respiratory disease.

“We aim to make today’s treatments more accessible, personal, powerful and convenient for each person who uses them, and enable physicians to measure, analyze and act to help their patients,” Propeller Health CEO David Van Sickle said in a statement. “Our goal is to connect and guide these patient-physician teams to find the right path of therapy for each individual.”

New investors from 3M Ventures, S.R. One, Limited and Hikma Ventures contributed to this round, as did existing investors Safeguard Scientifics and Social Capital.

With this round, Propeller Health has now raised more than $45 million.