Yes, but an oncologist is unnecessary for this. Pain management becomes the single most important thing to the patient until, finally, they reach the level where no legal painkiller can do anything for them. Then they lapse into a drug-induced coma-like state and die an excruciating death.

But before this, the patient is negotiating for something, anything, that will relieve his suffering. And money ceases to become an object.

Skip the oncologist, pass the drugs.