Under title II and title XVI, we consider a person disabled under Social Security rules if he or she has a medically determinable physical or mental impairment (or combination of impairments):

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  that prevents him or her from doing any substantial gainful activity (SGA), and

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  has lasted or is expected to last for a continuous period of at least 12 months, or is expected to result in death.

NOTE: The definition of disability also applies to persons applying for child’s insurance benefits based on disability before age 22 and for disability benefits payable after December 1990 as a widow(er) or surviving divorced spouse.

Under title XVI, we consider a child under age 18 disabled under Social Security rules if:

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  the child has a medically determinable physical or mental impairment (or combination of impairments) that:

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    causes marked and severe functional limitations;

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    has lasted or is expected to last for a continuous period of at least 12 months, or is expected to result in death; and

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  the child is not doing any SGA.

There are different rules for determining disability for persons who are statutorily blind. See information on the definition of blindness in DI 26001.001.

DI 10501.001 Meaning of SGA and Scope of Subchapter