The VA offers a number of support programs for Veterans that may benefit an Alzheimer's patient. In particular, Aid & Attendance may be used to help the veteran or surviving spouse, in the home, assisted living, or nursing home.
VA Health CareOverview
VA provides a Medical Benefits Package to all enrolled Veterans. This comprehensive plan provides a full range of preventive outpatient and inpatient services within VA health care system.
http://www4.va.gov/healtheligibility/