Which is just another government pay scale used specifically by HHS. There are a number of them, but in essence they are all the same thing. You can even find the history of his salary online, like any government employee.He does not fall under the GS pay scale thus not a GS employee. He is paid under the HHS RF-00 pay which is employees appointed and compensated as special consultants under 42 U.S.C. 209(f)
Employee Profile of Anthony S. Fauci — Medical Officer
www.federalpay.org