Actually, the dictionary definition of orthopedic is having to do with deformities of the skeletal system. If you are the federal government, though, you can make up your own definitions, since you control the budget. Some of the diagnoses that fall under this category really are not impairments of the skeletal system, for example, cerebral palsy.

Causes for orthopedic impairments range from birth defects such as cerebral palsy or spina bifida to impairment resulting from progressive diseases such as muscular dystrophy. Accidents are another cause. Amputations, due to accident, illnesses such as diabetes or other causes are also considered orthopedic impairments.