Disability Benefits for Spinal Muscular Atrophy (SMA)

How SSA Evaluates Spinal Muscular Atrophy Under Listing 11.22

Spinal muscular atrophy (SMA) is a genetic disorder that damages the motor neurons controlling voluntary muscles, causing progressive muscle weakness and wasting. It can affect walking, using the arms, swallowing, and breathing. SSA evaluates SMA under Blue Book listing 11.22 for motor neuron disorders other than ALS, which can be met in one of three ways.

• 11.22A — bulbar symptoms. Significant and persistent difficulty with speaking, swallowing, or breathing.
• 11.22B — motor function. Significant and persistent disorganization of motor function in two extremities, causing an extreme limitation in standing up from a seated position, balancing, or using the arms.
• 11.22C — physical plus mental limitation. A marked limitation in physical functioning together with a marked limitation in one area of mental functioning, such as concentrating and keeping pace or managing yourself.

SSA looks at how the weakness affects movement, breathing, and daily activity, and because SMA is progressive, it considers the overall course of the disease. The condition ranges widely in severity, so the medical record must show which muscles are affected and how much function has been lost. Genetic testing confirming the diagnosis, along with documentation of weakness, atrophy, and any breathing or swallowing problems, forms the core of a strong claim.

Medical Evidence for an SMA Claim

These claims are built on a confirmed diagnosis and documentation of lost function. SSA will look for:

• Genetic testing confirming the SMN1 gene changes that cause SMA, or other definitive diagnostic records.
• Exam findings — muscle weakness, atrophy, and reduced reflexes, with the muscle groups affected.
• Testing — EMG or nerve studies used to support the diagnosis.
• Records of breathing and swallowing problems, including any use of breathing support, and pulmonary function results.

Ask your neurologist to describe how the weakness limits standing, walking, using your arms and hands, and sustaining activity, and to document any breathing or swallowing involvement. Because SMA varies so much in severity, a record that clearly shows the extent of your weakness and its effect on daily function gives SSA what it needs to evaluate the claim.

Qualifying Through an RFC Assessment

When SMA does not meet listing 11.22, SSA assesses residual functional capacity (RFC). Progressive weakness limits standing, walking, climbing, and lifting and may require braces, a cane, or a wheelchair, while weakness in the arms and hands limits reaching, gripping, and fine manipulation. Muscles fatigue quickly, so activity that is possible briefly may not be sustainable over a workday.

Breathing problems can limit exertion, and swallowing difficulties can affect nutrition and stamina. SSA builds these limits into an RFC — often sedentary work with reduced exertion and extra breaks, or less if the arms are significantly involved — and compares it to your past jobs. If you cannot return to that work, the medical-vocational grid rules may direct a finding of disabled, particularly for claimants age 50 and older, and significant weakness in both hands or the breathing muscles can rule out full-time work entirely.

Tips for a Stronger SMA Claim

• Provide genetic testing confirming SMA, which firmly establishes the diagnosis.
• Document which muscles are affected and how the weakness limits standing, walking, and hand use.
• Report breathing and swallowing problems, which can meet the listing directly and add serious limits.
• Emphasize fatigue and how quickly your muscles tire with activity.
• Note assistive and breathing equipment you rely on, since these show the real severity of the disease.