Other sprain of unspecified thumb, sequela

This code signifies a chronic or late-effect complication resulting from a sprain of an unspecified thumb. It indicates that the initial injury has resolved, but the patient continues to experience residual symptoms or conditions directly attributable to that past sprain.

Apply this code when documenting a patient presenting with ongoing pain, stiffness, instability, or other long-term issues in the thumb that are a direct consequence of a previously sustained, unspecified thumb sprain. This is appropriate for follow-up encounters addressing these persistent sequelae.

• Requires a seventh character of "S" to indicate sequela.
• Ensure documentation clearly links the current thumb issue to a prior sprain.
• Do not use for acute or initial sprain encounters; those require an "A" or "D" seventh character.