Listing code
11.18
Adult (Part A)
Body system
11.00
Neurological disorders
Subsections
2
Lettered criteria paths
Step in evaluation
3 of 5
Listing match approves the claim
SSA listing text and criteria
Traumatic brain injury , characterized by A or B:
Subsection A
Disorganization of motor function in two extremities (see 11.00D1 ), resulting in an extreme limitation (see 11.00D2 ) in the ability to stand up from a seated position, balance while standing or walking, or use the upper extremities, persisting for at least 3 consecutive months after the injury. OR
Subsection B
Marked limitation (see 11.00G2 ) in physical functioning (see 11.00G3a ), and in one of the following areas of mental functioning, persisting for at least 3 consecutive months after the injury: Understanding, remembering, or applying information (see 11.00G3b(i) ); or Interacting with others (see 11.00G3b(ii) ); or Concentrating, persisting, or maintaining pace (see 11.00G3b(iii) ); or Adapting or managing oneself (see 11.00G3b(iv) ).
Source: SSA Blue Book listing 11.18. Last synced 2026-05-04.
Where claims under 11.18 usually fail
A frequent failure mode is presenting imaging results or the injury history without the required functional pattern in Subsection A (disorganization of motor function in two extremities, with extreme limitation in standing up from a seated position, balance while standing or walking, or use of upper extremities). Another common pitfall is mixing up the "A" and "B" pathways, such as trying to satisfy Subsection B with mental limitations only, when Subsection B also requires marked limitation in physical functioning plus mental functioning in one specified area. A third problem is using limitations that do not clearly persist for at least 3 consecutive months after the injury, even if the symptoms were severe early on. A fourth issue is not anchoring the mental-functional part of Subsection B to one of the specific areas listed (understanding, interacting with others, concentrating/persisting/maintaining pace, or adapting/managing oneself).
Medical evidence that strengthens this claim
Medical records should document the required post-injury functional limits for Subsection A or Subsection B, not just the traumatic brain injury diagnosis. For Subsection A, records need evidence of disorganization of motor function in two extremities and an extreme limitation in at least one of the listed abilities (standing up from a seated position, balance while standing or walking, or use of the upper extremities) that persists for at least 3 consecutive months. For Subsection B, records should show marked limitation in physical functioning and marked limitation in one of the listed mental functioning areas (understanding, remembering, or applying information; interacting with others; concentrating or maintaining pace; or adapting or managing oneself) persisting for at least 3 consecutive months.
What happens if your records do not meet this listing
If the specific criteria for 11.18 are not met, the claim still can be evaluated under the later steps that consider how the medical conditions affect the ability to do work. SSA will assess the overall functional impact using residual functional capacity concepts and then compare what can still be done with the type of work available. For claimants over 50, the medical-vocational comparison plays a large role when the remaining abilities significantly limit sustained work.
Work activity and the SGA gate for this condition
At the start of an SSDI claim, the ability to do substantial work activity is examined. Even with severe impairments, ongoing work performed at the level of substantial work can affect eligibility, so the question is whether work is being done at a level that is considered substantial. For traumatic brain injury under 11.18, the criteria require either disorganization of motor function in two extremities with extreme limitation affecting standing, balance, and/or upper extremity use (Subsection A), or marked limitation in physical functioning plus marked limitation in one of the listed mental functioning areas (Subsection B), all persisting for at least 3 consecutive months after the injury. If approved, work rules change after the approval period, including a trial period for work attempts and extended eligibility for those who qualify.
Listing 11.18 FAQ
Questions that come up repeatedly for traumatic brain injury , characterized by a or b disability claims.