Yes.
See Time.com. They repeat a quote of his from a CNN article:
> As a neurosurgeon, I was asked to step back from my journalist's role to look at his gunshot wound to the head. Shortly thereafter, I was removing a bullet from his brain.
From The Salt Lake Tribune:
> I probably owe my life to Dr. Gupta.
(said by Jesus Vidana, who "learned that the Navy's so-called Devil Docs had asked CNN medical correspondent Sanjay Gupta, a neurosurgeon, to operate when Vidana was airlifted to a field hospital in Iraq").
And from Los Angeles Daily News:
> Gupta switched from reporter to doctor, grabbed a drill bit and went to work.