DME- Special Medical Equipment, Home Modifications, And Minor Assistive Devices Beneficiaries who have service needs may be entitled to minor environmental modifications or special medical equipment. For additional information, see the following: Environmental home modifications(GW-EM) Special Medical Equipment (GW-SM) Minor assistive devices (GW-AD1) Rental Property Agreement (GW-RA) Homeowner Property Agreement – Authorization for Home Modifications/Special Equipment (GW-HM) Home Modifications, Special Medical Equipment and Assistive Devices Services Form (GW-SF)