Corrosion of unspecified degree of right lower leg, sequela

This code indicates a long-term complication or residual effect stemming from a past corrosive injury to the right lower leg. It signifies that the acute phase of the corrosion has resolved, but the patient continues to experience issues directly attributable to that original chemical or thermal burn, without specifying the initial severity of the burn.

This code is appropriate for documenting chronic conditions, scarring, contractures, or functional impairments of the right lower leg that are a direct consequence of a previously healed corrosive injury. It should be used when the patient is presenting for treatment of these persistent sequelae, rather than the initial acute injury.

• Requires a seventh character 'S' to denote sequela, indicating the long-term effects of a past injury.
• Do not use for acute corrosive injuries; separate codes exist for active burns/corrosions.
• Always code the specific nature of the sequela (e.g., scar, contracture) as a primary diagnosis, with this code as a secondary diagnosis to establish the etiology.