Flexion deformity, unspecified finger joints

This diagnosis code signifies a persistent bending or contracture of an unspecified finger joint, preventing full extension. It indicates a fixed position of flexion in one or more phalangeal joints of a finger, without specifying the exact finger or the underlying cause.

Use this code when documentation indicates a flexion deformity of a finger joint, but the specific finger (e.g., thumb, index, middle) is not identified. This code is appropriate when the provider notes a "flexion contracture of a finger" or "bent finger deformity" without further anatomical detail.

• Ensure the documentation clearly states "unspecified finger" or lacks specificity regarding the affected digit.
• If the specific finger is documented (e.g., index finger), a more precise code from the M21.24- series should be used.
• This code describes the deformity itself; additional codes may be needed for the underlying cause if known (e.g., arthritis, trauma).