The early stage medical development company raises the funds with backing from Kaiser Permanente and various venture firms.

Healthcare company Kaiser Permanente has helped Torax Medical raise $30m in a Series D round.

The early stage medical development company was backed by venture firms Thomas, McNerney & Partners, Sanderling Ventures, Accuitive Medical Ventures, and Mayo Medical Ventures. The round was led by Piper Jaffray Merchant Banking, a unit of the investment bank.

Torax Medical is a developer of minimally-invasive treatments for digestive, incontinence and obesity disorders. Torax intends to use the investment to expand commercialization efforts for its family of sphincter augmentation products.

Torax Medical has raised at least $31m in previous roundsaccording to regulatory filings.