Doctor Usanagi

 is the owner of the New Vegas Medical Clinic in 2281.

Other interactions
As a doctor, Usanagi can heal you. However, she is also a highly skilled surgeon, so if you need something along the lines of an auto-psycho implant or sub-dermal armor plates, ask her. See Fallout: New Vegas implants. She will give you a discount on her wares if you're a friend to the Followers of the Apocalypse. She will also pay full value for items in your inventory if you're a friend to Followers of the Apolcalypse, although she typically only has between 1,000-3,000 caps on her at any given time.

Appearances
appears in Fallout: New Vegas.

Bugs
Although Usanagi will ask for donations to the Followers of Apocalypse, a buggy script checks her inventory instead of the player's for the required caps, thus preventing donations from being made.

On PC, this can be fixed with a mod.