Achilles tendinitis, left leg

This code signifies inflammation of the Achilles tendon in the patient's left leg. This condition typically presents with pain, swelling, and stiffness in the posterior ankle, often exacerbated by activity. It can result from overuse, sudden increases in activity, or improper footwear.

Apply this code when documentation explicitly states a diagnosis of Achilles tendinitis affecting the left lower extremity. Supporting clinical notes should describe symptoms consistent with tendinitis, such as pain in the Achilles region, tenderness to palpation, and functional limitations.

• Ensure the laterality (left leg) is clearly documented; do not use this code for bilateral or unspecified Achilles tendinitis.
• Distinguish from Achilles tendon rupture (S86.0-) or other ankle/foot sprains/strains (S93.4-).
• Consider sequencing with external cause codes (V00-Y99) if the tendinitis is due to an injury or activity.