Enhancing Veterans' Access to Treatment Act of 2015

Directs the Department of Veterans Affairs (VA) to furnish to a veteran enrolled in the VA's patient enrollment system a drug or medicine that a duly licensed physician has determined such veteran is taking or has taken during the preceding 90 days and that has been effective in treating a mental health disorder with which the veteran has been diagnosed, if the prescription is ordered by a duly licensed physician, regardless of whether such drug or medicine is available under the formulary in use by the VA.

Directs the VA to revise its prescription medication formulary to ensure that all medications within the classes of antipsychotics and antidepressants that are prescribed by DOD physicians, including such medications prescribed for the treatment of post-traumatic stress disorder, traumatic brain injury, schizophrenia, depression, and bipolar disorder, are available at all VA pharmacies.