Voyageurs National Park is listed here because they have some health initiatives (Hike to Health) in partnership with Rainy Lake Medical Center, Jefferson National Parks Association, and REI.
While listed on parksrx.org as having a nature on prescription program, they do not seem to have one at the moment.
 
https://www.nps.gov/voya/planyourvisit/hike-to-health.htm