It's standard clinical procedure:

1) Examine signs and symptoms to arrive at a diagnosis.
2) Apply currently approved treatments and therapies.
3) Explode in a hellish ball of fire.

I see the pattern on the robe, then the flames, I am thinking Phoenix.

Something like:
1) Examine and diagnose.
2) Absorb the disease to remove it from the patient.
3) Incinerate the 'container' for disposal of the disease.
4) Rebirth of the healer after incineration.