What is the test for deliberate indifference in prison medical malpractice cases?

If a prisoner establishes the existence of a serious medical need, he must show that prison officials responded to the serious medical need with deliberate indifference. See Id. at 834. In general, deliberate indifference may be shown when prison officials deny, delay, or intentionally interfere with medical treatment, or may be shown by the way in which prison officials provide medical care. Hutchinson v. United States, 838 F.2d 390, 393-94 (9th Cir. 1988).