Physician Group of Arizona, Inc. has announced the addition of Dr. Mauricio A. Valdes, M.D. to the Hedley Orthopaedic Institute. Valdes focuses on the diagnosis and treatment of neck and back pain diseases, along with their causes and effects. Some examples include arthritis, disc herniation, degenerative disc disease, spinal deformities and scoliosis, tumors, and infections. Hedley Orthopaedic Institute is accepting new patients at its three Valley offices: 2122 E. Highland Ave., Suite 300, Phoenix; 1492 S. Mill Ave., Suite 113, Tempe; and 10238 E. Hampton Ave, Suite 301A, Mesa.