Vertos Medical Inc. has announced it has raised $23 million in series E financing.

Vertos Medical, based in Aliso Viejo, Calif., develops minimally invasive treatments for lumbar spinal stenosis (LSS). Its proprietary technologies include mild, an outpatient, minimally invasive, fluoroscopically guided therapeutic LSS treatment.

The financing was led by Pitango Venture Capital and joined by existing investors including ONSET Ventures, CHL Medical Partners, Foundation Medical Partners, Mercury Fund and Aweida Venture Partners. It will support continued growth in the adoption of mild.