Yes, you would treat the scooter as a wheelchair. Based on the IRS publication, you can include in medical expenses amounts you pay for a wheelchair used mainly for the relief of sickness or disability, and not just to provide transportation to and from work. The cost of operating and maintaining the wheelchair is also a medical expense.
For more information on medical expenses, visit the IRS publication below.
https://www.irs.gov/publications/p502/ar02.html#en_US_2015_publink1000178989