Strain of unspecified Achilles tendon, sequela

This code signifies a chronic or late-effect condition resulting from a previous strain of an Achilles tendon, where the specific tendon (left or right) is not documented. It indicates that the initial injury has resolved, but residual symptoms, functional limitations, or complications persist.

Apply this code when documentation clearly indicates a sequela (e.g., chronic pain, weakness, stiffness, scar tissue formation) directly attributable to a past Achilles tendon strain. This is appropriate when the original acute injury is no longer active and the current encounter addresses the long-term consequences.

• Always ensure the "S" seventh character for sequela is appropriate, indicating a late effect.
• Confirm that the documentation explicitly states "unspecified Achilles tendon" if laterality is not specified.
• Do not use this code for an acute or subacute Achilles tendon strain; those require different seventh characters.