MEMORANDUM **

Michael D. Woodfall, a former Hawaii state prisoner, appeals pro se from the district court’s summary judgment in his 42 U.S.C. § 1983 action alleging deliberate indifference to his serious medical needs while housed in Arizona. 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 because Woodfall failed to raise a genuine dispute of material fact as to whether defendants were deliberately indifferent in treating his lower back injury. See id. at 1057-58 (a prison official acts with deliberate indifference only if he or she knows of and disregards an excessive risk to the prisoner’s health; neither a prisoner’s difference of opinion concerning the course of treatment nor mere negligence in diagnosing or treating a medical condition amounts to deliberate indifference).

We do not consider matters not specifically and distinctly raised and argued in the opening brief. See Padgett v. Wright, 587 F.3d 983, 985 n. 2 (9th Cir. 2009) (per curiam).

AFFIRMED.