The others are California, Colorado, Hawaii, Maine, New Jersey, New Mexico, Oregon, Vermont, and Washington; it is authorized in the District of Columbia as well.

Among the groups filing amicus briefs on behalf of the state were the Alliance Defense Fund on behalf of the Family Research Council, Americans United for Life, the American Association of Pro-Life Obstetricians and Gynecologists, disability rights group Not Dead Yet,[16] and the Catholic Medical Association.

The Montana Medical Association issued a statement opposing physician-assisted suicide, but refused to file an amicus brief in the appeal.

"[17] Since the Montana Supreme Court chose only to rule on statutory grounds, groups opposed to medical aid in dying have since tried to overturn the decision at the legislature.

[18] In 2015, Erwin Byrnes became the first patient to speak publicly about his plans to take the medication, saying “We have to be kind of the driver of our own bus.”[19] In 2015, The Journal of Palliative Medicine published the article "Clinical Criteria for Physician Aid in Dying" for doctors to use as guidance in states like Montana, where provisions are not detailed in statute.