Several programs across the University of Colorado system earned high rankings in the U.S. News & World Report's 2015 list of the best graduate schools in the country.

Among the programs honored was CU-Boulder's atomic/molecular/optical physics program, which was ranked as the top school nationally in its field.

CU-Boulder's engineering and environmental law programs were both ranked ninth, while its physics, clinical psychology and audiology programs were all ranked 18th in their fields.

CU's Anschutz Medical Campus was ranked 13th nationally for primary care, with the specialties of family medicine (fifth), pediatrics (sixth) and rural medicine (ninth) all receiving top-10 rankings.

The CU-Denver and CU-Colorado Springs shared a 29th-place ranking for their public affairs program.

The report gathered statistical information on more than 1,250 programs nationwide to compile rankings in five of the largest professional graduate school disciplines -- business, law, education, engineering and medicine -- as well as some part-time programs. The rankings are based on expert opinions and statistical indicators that measure the quality of a school's faculty, research and students.

The full 2015 guidebook will be available from U.S. News online in late March and on newsstands on April 8.