26. Through the anointing of the sick, the Church commends to the suffering and glorified Lord the faithful who are seriously ill, so that they may be relieved of their suffering and be saved (Canon 998).
27. Those who have the care of souls and those who are close to the sick are to see to it that the faithful who are in danger due to sickness or old age are supported by the sacrament of anointing at the appropriate time (Canon 1001).
28. Since disability does not necessarily indicate an illness, Catholics with disabilities should receive the sacrament of anointing on the same basis and under the same circumstances as any other member of the Christian faithful (Cf. canon 1004).
29. The anointing of the sick may be conferred if the recipient has sufficient use of reason to be strengthened by the sacrament, or if the sick person has lost the use of reason and would have asked for the sacrament while in control of his or her faculties (Rite of Anointing, nn. 12, 14). If there is doubt as to whether the sick person has attained the use of reason, the sacrament is to be conferred (Canon 1005). Persons with disabilities may at times be served best through inclusion in communal celebrations of the sacrament of anointing (Cf. canon 1002).
SOURCE: Guidelines for the Celebration of the Sacraments with Persons with Disabilities (USCCB)