Lie, no. Omit, absolutely. She is not at liberty to speak on the issue without consent from the patient. That she may have chosen to speak a partial truth is wrong but it is a very fine line in reality. Crossing that line could cost her, her entire career. Remaining silent, in the case of Hillary, just might cost her, her life.
What I think is going on is a whole lot of seemingly normal health data being cherry picked from different times.
I understand that doctor may have been hoodwinked or whatever, but her best course would be to STFU and shop Clinton out to another doctor.