What is the test for deliberate indifference in medical care?

that a prisoner's civil rights have been abridged with regard to medical care, "the indifference to his medical needs must be substantial. Mere 'indifference,' 'negligence,' or 'medical malpractice' will not support this cause of action." Broughton v. Cutter Laboratories, 622 F.2d 458, 460 (9th Cir. 1980) (citing Estelle, 429 U.S. at 105-106). See also Toguchi, 391 F.3d at 1060. Deliberate indifference is "a state of mind more blameworthy than negligence" and "requires more than ordinary lack of due care for the prisoner's interests or safety." Farmer, 511 U.S. at 835 (quoting Whitley v. Albers, 475 U.S. 312, 319 (1986).