The ring or little finger is stiff or locked in place, limiting its ability to move.
Because the rating under this code is 0% regardless of whether ankylosis is favorable or unfavorable, the most useful evidence focuses on the two additional considerations VA must make: whether amputation criteria apply and whether other fingers or overall hand function are affected.
Medical records and physical examination findings should document which joints are locked (metacarpophalangeal, proximal interphalangeal, or both), the exact position of each ankylosed joint, and the measured gap between the fingertip and the proximal transverse crease of the palm when you try to flex the finger. If both joints are ankylosed, the records should note any extension, full flexion, rotation, or angulation, because those findings trigger evaluation as an amputation.
Range-of-motion measurements for your other fingers on the same hand matter if the ankylosis restricts their movement. Statements from you or people who know you describing difficulty gripping, pinching, or performing tasks at work or at home can help show interference with overall hand function, which supports a separate evaluation at a higher level.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.
