The Expanded Disability Status Scale (EDSS)

0.0: Normal neurological exam.

1.0: No disability, but minimal signs in one functional system (FS) are present.
1.5: No disability, but minimal signs in more than one FS are present.
2.0: Minimal disability in one FS is present.
2.5: There is mild disability in one FS or minimal disability in two FS.
3.0: There is moderate disability in one FS or mild disability in three or four FS. However, the person is still fully ambulatory.
3.5: The person is fully ambulatory, but has moderate disability in one FS and mild disability in one or two FS; or moderate disability in two FS; or mild disability in five FS.
4.0: The person is fully ambulatory without aid, and is up and about most of the day (12 hours) despite relatively severe disability. He or she is able to walk 500 meters without aid or rest.
4.5: The person is fully ambulatory without aid, and is up and about much of day. He or she is able to work a full day, but may otherwise have some limitations of full activity or require minimal assistance. This is considered relatively severe disability. Able to walk 300 meters without aid.
5.0: The person is able to walk 200 meters without aid or rest. Disability impairs full daily activities, such as working a full day without special provisions.
5.5: The person is able to walk 100 meters without aid or rest. Disability precludes full daily activities.
6.0: The person needs intermittent or unilateral constant assistance (cane, crutch or brace) to walk 100 meters with or without resting.
6.5: The person needs constant bilateral support (cane, crutch or braces) to walk 20 meters without resting.
7.0: The person is unable to walk beyond five meters even with aid, and is essentially restricted to a wheelchair. However, he or she wheels self and transfers alone, and is active in wheelchair about 12 hours a day.
7.5: The person is unable to take more than a few steps and is restricted to wheelchair, and may need aid to transfer. He or she wheels self, but may require a motorized chair for a full day's activities.
8.0: The person is essentially restricted to bed, a chair or a wheelchair, but may be out of bed much of day. He or she retains self care functions and has generally effective use of arms.
8.5: The person is essentially restricted to bed much of day, but has some effective use of arms and retains some self care functions.
9.0: The person is confined to bed, but still able to communicate and eat.
9.5: The person is totally helpless and bedridden and is unable to communicate effectively or eat and swallow. 10.0: Death due to MS.