Listing code
1.18
Adult (Part A)
Body system
1.00
Musculoskeletal disorders
Subsections
4
Lettered criteria paths
Step in evaluation
3 of 5
Listing match approves the claim
SSA listing text and criteria
Abnormality of a major joint(s) in any extremity (see 1.00I ), documented by A, B, C, and D:
Subsection A
Chronic joint pain or stiffness. AND
Subsection B
Abnormal motion, instability, or immobility of the affected joint(s). AND
Subsection C
Anatomical abnormality of the affected joint(s) noted on: 1. Physical examination (for example, subluxation, contracture, or bony or fibrous ankylosis); or 2. Imaging (for example, joint space narrowing, bony destruction, or ankylosis or arthrodesis of the affected joint). AND
- Physical examination (for example, subluxation, contracture, or bony or fibrous ankylosis); or
- Imaging (for example, joint space narrowing, bony destruction, or ankylosis or arthrodesis of the affected joint). AND
Subsection D
Impairment-related physical limitation of musculoskeletal functioning that has lasted, or is expected to last, for a continuous period of at least 12 months, and medical documentation of at least one of the following: 1. A documented medical need (see 1.00C6a ) for a walker, bilateral canes, or bilateral crutches (see 1.00C6d ) or a wheeled and seated mobility device involving the use of both hands (see 1.00C6e(i) ); or 2. An inability to use one upper extremity to independently initiate, sustain, and complete work-related activities involving fine and gross movements (see 1.00E4 ), and a documented medical need (see 1.00C6a ) for a one-handed, hand-held assistive device (see 1.00C6d ) that requires the use of the other upper extremity or a wheeled and seated mobility device involving the use of one hand (see 1.00C6e(ii) ); or 3. An inability to use both upper extremities to the extent that neither can be used to independently initiate, sustain, and complete work-related activities involving fine and gross movements (see 1.00E4 ).
- A documented medical need (see 1.00C6a ) for a walker, bilateral canes, or bilateral crutches (see 1.00C6d ) or a wheeled and seated mobility device involving the use of both hands (see 1.00C6e(i) ); or
- An inability to use one upper extremity to independently initiate, sustain, and complete work-related activities involving fine and gross movements (see 1.00E4 ), and a documented medical need (see 1.00C6a ) for a one-handed, hand-held assistive device (see 1.00C6d ) that requires the use of the other upper extremity or a wheeled and seated mobility device involving the use of one hand (see 1.00C6e(ii) ); or
- An inability to use both upper extremities to the extent that neither can be used to independently initiate, sustain, and complete work-related activities involving fine and gross movements (see 1.00E4 ).
Source: SSA Blue Book listing 1.18. Last synced 2026-05-04.
Where claims under 1.18 usually fail
A frequent failure is stopping after one or two lettered criteria, such as having chronic pain but not having abnormal motion, instability, or immobility documented under subsection B. Another failure is missing the "anatomical abnormality" documentation under subsection C, such as not having the required physical exam findings (for example subluxation, contracture, or bony or fibrous ankylosis) or required imaging findings (for example joint space narrowing, bony destruction, or ankylosis/arthrodesis of the affected joint). Some records also miss subsection D because they do not show the required duration of at least 12 months and do not document at least one of the specified functional limits involving a walker, bilateral canes, bilateral crutches, a wheeled and seated mobility device, or the specific upper-extremity limitations. Finally, people sometimes describe difficulty with a joint but do not document the specific combination of upper-extremity impairment and the need for the specified one-handed or one-hand mobility device described in subsection D.
Medical evidence that strengthens this claim
Medical documentation should include evidence for all four subsections A through D. Subsection A is chronic joint pain or stiffness. Subsection B needs abnormal motion, instability, or immobility of the affected joint(s). Subsection C requires an anatomical abnormality on physical examination (for example subluxation, contracture, or bony or fibrous ankylosis) or on imaging (for example joint space narrowing, bony destruction, or ankylosis or arthrodesis). Subsection D requires evidence of a physical limitation lasting or expected to last at least 12 months and at least one of the following, documented in the medical record: a documented medical need for a walker, bilateral canes, or bilateral crutches, or a wheeled and seated mobility device using both hands; or an inability to use one upper extremity for work-related fine and gross movements plus a documented medical need for a one-handed hand-held assistive device that requires the other upper extremity, or a wheeled and seated mobility device using one hand; or an inability to use both upper extremities to the extent that neither
What happens if your records do not meet this listing
If the full set of requirements for 1.18 (A through D) is not met, step 4 and step 5 still matter because a disability decision can be based on what can be done in light of the residual functional capacity. In practice, the missing piece is often one of the lettered criteria, especially subsection C (anatomical abnormality on exam or imaging) or subsection D (the 12-month duration plus the specific assistive-device or upper-extremity functional limit). Even if the listing is not met, the analysis may still consider whether the impairments prevent sustained work when residual functional capacity is assessed.
Work activity and the SGA gate for this condition
For SSDI, work activity above the substantial gainful activity level can affect whether the claim can be approved, regardless of whether the condition is severe. This listing includes a major-joint abnormality with chronic pain or stiffness (subsection A), abnormal motion, instability, or immobility (subsection B), and an anatomical abnormality on exam or imaging (subsection C), plus a 12-month duration and specific limits involving assistive devices or upper-extremity use (subsection D). If approved, continued disability is determined through the SSA rules on trial work period and extended period of eligibility for those who meet the program's disability definition.
Listing 1.18 FAQ
Questions that come up repeatedly for abnormality of a major joint(s) in any extremity disability claims.