Graduate students can avail of the graduate assistant/fellow medical insurance plan which covers health, dental and eye care. Details about the benefits and costs are nicely tabled in the university website: link
Students also have mental health services available at the university, some of which is covered by their graduate student insurance.
Counseling And Psychological Services (CAPS) provide mental health care through various methods like individual counseling and group therapy. This link has information about CAPS services, private providers, costs and hotlines.
Finally, this link contains a list of various resources available to students for general health and wellness.