Doctor Usanagi

 is the owner of the New Vegas Medical Clinic.

She can install implants for the player character.

Interactions with the player character
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 Implants (Fallout: New Vegas).

Appearances
appears in Fallout: New Vegas.

Bugs
Cant seem to make a donation to the Followers through her dialog option. She said they only take increments of 500 caps and I have well over 30k. Potentially part of the problem?