VA Disability Rating for Lower Radicular Group (Klumpke) Paralysis
Diagnostic Code 8512 · 38 CFR §4.124a
What Is It?
The lower radicular group involves the C8 and T1 nerve roots in the brachial plexus, which control the intrinsic muscles of your hand and your ability to grip, pinch, and perform fine motor tasks. When these nerve roots are damaged, you lose hand dexterity, grip strength, and the ability to spread or close your fingers. This pattern is sometimes called Klumpke paralysis. Veterans may develop this from injuries that forcefully pull the arm upward, blast injuries, heavy falls, or other trauma that damages the lower portion of the brachial plexus.
Rating Criteria
| Rating | Criteria |
|---|---|
| 70% | Complete paralysis in the major (dominant) arm: all intrinsic muscles of the hand, and some or all of the flexors of the wrist and fingers, paralyzed (substantial loss of use of the hand). |
| 60% | Complete paralysis in the minor (non-dominant) arm. Same presentation as the 70 percent level. |
| 50% | Severe incomplete paralysis in the major (dominant) arm. |
| 40% | Severe incomplete paralysis in the minor (non-dominant) arm, or moderate incomplete paralysis in the major (dominant) arm. |
| 30% | Moderate incomplete paralysis in the minor (non-dominant) arm. |
| 20% | Mild incomplete paralysis. Same rating for the major and the minor arm. |
Evidence Needed
- Medical records documenting lower brachial plexus injury connected to service
- Electromyography and nerve conduction studies identifying C8-T1 involvement
- Grip strength and pinch strength measurements
- Documentation of which hand is your dominant hand
- Occupational therapy records showing functional hand limitations
C&P Exam Tips
- Make sure the examiner notes your dominant hand
- Demonstrate difficulty with fine motor tasks like buttoning a shirt or picking up coins
- Show any visible muscle wasting between the bones of your hand
- Describe how hand weakness affects your work and hobbies
- Mention any numbness along the inner forearm and ring and little fingers
How to File
File under DC 8512 for lower radicular group paralysis. The rating depends on which arm is affected, so clearly document your handedness: 38 CFR 4.124a prints complete paralysis at 70 percent for the major arm and 60 for the minor, severe incomplete paralysis at 50 and 40, moderate at 40 and 30, and mild at 20 percent for either arm. Include nerve testing that shows C8 and T1 involvement to distinguish this from other nerve conditions affecting the hand.
Common Mistakes
- Having hand weakness misdiagnosed as carpal tunnel or ulnar neuropathy.
- Not documenting dominant versus non-dominant hand.
- Failing to report associated symptoms like Horner syndrome to the examiner.
- Not getting specialized hand function testing from an occupational therapist.
Frequently Asked Questions
What is Horner syndrome and how does it relate to lower brachial plexus injuries?
Horner syndrome causes a drooping eyelid, constricted pupil, and decreased sweating on one side of the face. It can occur alongside lower brachial plexus injuries because the sympathetic nerve fibers that travel through the T1 nerve root may also be damaged. If you have these symptoms, report them as they may warrant a separate rating.
Can I get rated for both hand weakness and a neck condition?
Yes, if a cervical spine condition is causing your lower radicular group paralysis, you can receive separate ratings for the spine condition and the nerve damage, as long as each rating addresses different functional impairments.