WebMD Holdings, a company that runs a series of websites providing health information services to consumers, physicians and healthcare professionals, registered for an initial public offering Thursday morning. The New York, NY-based entity is a spinoff from its publicly traded parent, WebMD Corp (HLTH), and also generated $134 million in revenues for the fiscal year 2004. WebMD Holdings plans to change its name prior to the offering. No underwriters are currently listed for the deal. Terms and timing for the deal have yet to be determined.