9. Relievant Medsystems
Minneapolis
Venture capital raised: $58 million
Relievant Medsystems raised $58 million in Q2 of 2018 during its later stage of development, according to a MoneyTree report.
The company provides a therapy that is supposed to eliminate back pain while preserving other therapeutic options. Its Intracept System is a minimally-invasive procedure that uses radiofrequency energy delivered through a small access tube into the vertebral body to ablate the basivertebral nerve.