MEMORANDUM
California state prisoner Henry A. Jones appeals pro se from the district court’s summary judgment in his 42 U.S.C. § 1983 action alleging deliberate indifference to his health and safety. We have jurisdiction under 28 U.S.C. § 1291. We review de novo, Toguchi v. Chung, 391 F.3d 1051, 1056 (9th Cir.2004), and we affirm.
The district court properly granted summary judgment on Jones’s medical deliberate indifference claims because Jones failed to raise a genuine dispute of material fact as to whether defendants were deliberately indifferent to his chronic insomnia. See id. at 1057-58, 1060 (deliberate indifference is a high legal standard; mistakes, negligence, or malpractice by medical professionals are not sufficient to constitute deliberate indifference, nor is an inmate’s difference of opinion with the physician regarding the appropriate course of treatment).
The district court properly granted summary judgment on Jones’s deliberate indifference to safety claim against Van-derostyne because Jones failed to raise a genuine dispute of material fact as to whether Vanderostyne knew of and disregarded an excessive risk to Jones’s safety when she denied Jones’s request to be single celled. See Farmer v. Brennan, 511 U.S. 825, 837, 114 S.Ct. 1970, 128 L.Ed.2d 811 (1994) (claim of deliberate indifference requires showing that “the official [knew] of and disregarded] an excessive risk to inmate ... safety”).
We reject Jones’s contentions concerning discovery because the record shows that Jones received notice of his right to conduct discovery, as well as his rights and obligations in responding to defendants’ motion for summary judgment.
We treat Jones’s letter received on January 31, 2014, as a request to file a late reply brief, and grant the request. The Clerk shall file the reply brief submitted on November 12, 2013.
AFFIRMED.
This disposition is not appropriate for publication and is not precedent except as provided by 9th Cir. R. 36-3.