@pp27va Thank you for the information. If you wanted to request an appointment at Mayo in Rochester, I can suggest an orthopedic trauma surgeon who may be able to help. I saw him as a patient to put my ankle back together after a bad compound fracture. He also takes cases where bones can be straightened, realigned and lengthened and also improving severe bone deformities to a more normal function, such as severely bowed legs when a patient cannot walk normally.

His name is Andy Sems and here is his profile.
https://www.mayoclinic.org/biographies/sems-stephen-andy-a-m-d/bio-20054747
You may use this link to request an appointment for any of the Mayo Campuses, and he is in Rochester.
http://mayocl.in/1mtmR63
Here is information about Dr. Sems at the Mayo Clinic Limb lengthening and Regeneration Clinic.
https://www.mayoclinic.org/medical-professionals/orthopedic-surgery/news/multidisciplinary-and-coordinated-approach-to-limb-lengthening-care/mac-20508158
I also found this alumni news story that gives some of his background.
https://www.gcc.edu/Home/News-Archive/News-Article/accomplished-alum-dr-andy-sems-95-to-speak-at-graduation
My elderly mom has a foot deformity, and after fracturing a bone in the foot, everything tightened up to where she couldn't walk because her foot was in a position as if she pointed her toes and twisted the ankle at the same time. A surgeon lengthened the Achilles's tendon, and also moved some muscle attachments on the bottom of the foot. It improved her situation, but didn't make her feet completely normal again. She still had the deformity from bunions and toes turned toward the pinky side, but at least she could stand on her foot again, and walk better. Because she is at risk for falling and has osteoporosis, she uses a wheelchair anyway. (This was done locally and not at Mayo.)

Has your husbands pronation gotten progressively worse? Do you think he will want to improve his walking function if surgery is required?