Health care services company McKesson Corp. plans to expand its medical supply business through the proposed acquisition of PSS World Medical for $1.46 billion in cash. It is the latest in a series of major health care deals this year.

Simpson Thacher & Bartlett is advising San Francisco–based McKesson on the deal, reprising the role the firm played for the company in connection with McKesson’s 2006 acquisition of Atlanta-based health care management systems maker Per-Se Technologies for approximately $1.8 billion.