IPC The Hospitalist Co. on Friday registered an initial public offering of up to $105 million in common stock.

The North Hollywood, Calif., provider of inpatient care didn't disclose in its prospectus filed with the Securities and Exchange Commission how many shares it will offer or estimate a price range for the IPO.

Venture investors have poured more than $47 million into IPC since 1998, according to VentureOne, a market tracker owned by Dow Jones & Co., publisher of this newsletter. Scale Venture Partners, Sightline Partners, Morgenthaler Venture Partners and Bessemer Venture Partners are among its investors.

Prior to the filing, IPC's largest institutional backers included Scale Venture Partners, which owned 30.92% of the company; Morgenthaler, which owned 25.13%; Bessemer, which owned 17.36%; and CB Health Ventures, with a 14.80% share.

The company said it will apply to list its common stock on the Nasdaq Global Market under the symbol IPCM.

Credit Suisse, Jefferies & Co., Wachovia Securities and William Blair & Co. are listed as underwriters for the IPO.

The company intends to use the net proceeds from the IPO to repay debt and for general corporate purposes, including the acquisition of physician practices and working capital.

For the six months ended June 30, IPC's net income increased to $3.6 million from $1.6 million during the same period a year earlier.