Inj extn musc/fasc/tend at forearm level, left arm, sequela

This code signifies a long-term or late-effect complication resulting from a previous injury to an extensor muscle, fascia, or tendon in the left forearm, excluding the flexor pollicis longus and other specified muscles. These sequelae can manifest as chronic pain, weakness, limited range of motion, or other persistent functional deficits.

Apply this code when documenting a patient presenting with a current condition directly attributable to a past injury of an unspecified extensor structure in the left forearm. This is used after the acute phase of the initial injury has passed, and the patient is experiencing residual effects.

• Always assign an external cause code (e.g., V00-Y99) to describe the circumstances of the original injury, if known.
• Ensure documentation clearly links the current condition to a previous injury of the left forearm's extensor muscles, fascia, or tendons.
• This "S" seventh character indicates sequela and should be used for complications or conditions that arise as a direct result of a previous injury.