I cannot create a summary of the requested article from MedPage Today because its content is not found in the search results provided. Available sources contain only basic information about Dr. Thomas Kean - that he began serving as the National Coordinator for Health Information Technology at HHS in June 2025[3] and that he is an engineer and interventional radiologist with previous experience at HHS[3][5]. In order to create an accurate and factual summary of the article titled "Will AI Replace Physicians? Can Prior Auth Be Fixed? A Q&A With HHS's Health IT Czar", I would need access to the full text of this article from MedPage Today.