Strain of extn musc/fasc/tend at forarm lv, left arm, subs

This code signifies a non-traumatic overstretching or tearing of an extensor muscle, its fascia, or tendon in the left forearm, excluding the thumb or finger extensors. It represents an injury that has occurred previously and the patient is now receiving follow-up care.

Use this code for patients presenting for ongoing treatment, rehabilitation, or follow-up appointments for a previously diagnosed strain of the left forearm's extensor muscles (e.g., extensor carpi radialis, extensor digitorum). This applies when the initial injury has already been coded and the current encounter is for subsequent management.

• Ensure the documentation clearly specifies "left arm" and "forearm level" for the extensor strain.
• Verify that the encounter is for subsequent care, not the initial injury or sequela.
• Distinguish from strains of specific thumb or finger extensors, which have their own dedicated codes.