EDUCATIONAL TOOL ONLY. Not legal or medical advice. Not affiliated with the VA.
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Thumb Basal Joint Arthritis
DC 5224 | 38 CFR § 4.71a, DC 5224 |
Thumb Basal Joint Arthritis is rated by the U.S. Department of Veterans Affairs under DC 5224 of 38 CFR § 4.71a, DC 5224 across 3 severity tiers (20% / 10% / 0%). Service connection requires (1) a current diagnosis, (2) an in-service event, injury, or exposure, and (3) a medical nexus opinion linking the two under 38 C.F.R. § 3.303.
OVERVIEW
Degenerative arthritis at the carpometacarpal (CMC) joint at the base of the thumb, causing pain with pinching, gripping, and twisting motions
RATING CRITERIA (3 LEVELS)
20%
DC 5224 "Thumb, ankylosis of: unfavorable" = 20% (Major or Minor — verbatim 20/20). (Verbatim § 4.71a DC 5224.) Per § 4.71a finger guidance: unfavorable thumb ankylosis = both CMC and IP joints ankylosed in extension or rotation, OR ankylosis with deformity, OR ankylosis where thumb cannot oppose fingers; OR — DC 5003 X-ray-only "2+ minor joint groups with occasional incapacitating exacerbations" = 20%. (Verbatim § 4.71a DC 5003.)
10%
DC 5224 "Thumb, ankylosis of: favorable" = 10% (Major or Minor); DC 5228 "Thumb, limitation of motion: With a gap of one to two inches (2.5 to 5.1 cm) between thumb pad and fingers, with the thumb attempting to oppose the fingers" = 10%; OR — DC 5003 single-minor-joint-group fallback (thumb is part of hand minor-joint group) with painful motion at CMC joint / positive grind test = 10%; OR — DC 5003 X-ray-only "2+ minor joint groups" = 10%. (Verbatim § 4.71a.)
0%
Thumb basal joint arthritis (X-ray Eaton-Glickel staging documented) without compensable ankylosis under DC 5224 AND without compensable gap measurement under DC 5228 (gap <1 inch) AND without objectively-confirmed painful-motion findings.
KEY EVIDENCE TO GATHER
-Service treatment records showing injury or complaints
-Imaging (X-ray, MRI, CT)
-Range of motion measurements
-Flare-up documentation per Sharp v. Shulkin
-Buddy statements describing limitations
-Prescription history
-Physical therapy records
-Employment impact documentation
C&P EXAM TIPS (6)
1.Do NOT stretch, warm up, or take pain medication before your exam. The VA needs your baseline limitation.
2.Report your WORST day. DeLuca v. Brown requires documentation of functional loss during flare-ups.
3.Tell the examiner about flare-ups: frequency, duration, estimated ROM loss. Sharp v. Shulkin (2017) requires estimates.
4.Request active, passive, weight-bearing, and non-weight-bearing ROM testing per Correia v. McDonald (2016).
5.If you use assistive devices (brace, cane), bring them.
6.Describe daily activity impact: work, sleep, household tasks.
SOURCES & EDITORIAL
Rating criteria reference 38 C.F.R. Part 4 (Schedule for Rating Disabilities). This entry has not yet undergone editorial review against the live regulation text — consult the authoritative source directly before relying on the criteria shown.
EDUCATIONAL TOOL ONLY. NOT LEGAL OR MEDICAL ADVICE.
NOT AFFILIATED WITH THE U.S. DEPARTMENT OF VETERANS AFFAIRS.
CLAIM RECON 2026