A health care program in a class by itself.

Hello,

The Master of Science in Health Care Policy & Management (MSHCPM) program is a health care program in a class by itself.

Rather than focusing simply on hospital administration or public health, our program holistically covers all points of the health care continuum, from health care delivery to health data systems and technologies, and the various business and policy challenges that impact each stage of care.

https://www.heinz.cmu.edu/programs/health-care-policy-management-master/right-for-me

How can I interpret the part in bold? What does "by itself" mean?