Adverse effect of opth drugs and preparations, sequela

This code signifies a long-term or residual adverse effect resulting from the use of ophthalmological medications or preparations. It indicates that the initial acute adverse reaction has resolved, but the patient continues to experience a lasting consequence attributable to the drug. This could involve persistent visual disturbances, chronic eye irritation, or structural changes to the eye.

Use this code when documenting a patient presenting with a chronic or permanent condition directly linked to a past adverse reaction to an eye medication. Examples include persistent dry eye syndrome following an allergic reaction to eye drops, or permanent vision impairment after a drug-induced optic neuropathy. It is appropriate when the initial acute event has passed, but the sequela remains.

• Always code the specific nature of the sequela first, followed by this code.
• Ensure documentation clearly links the current chronic condition to a past adverse drug event involving an ophthalmological agent.
• This "S" seventh character indicates a sequela, meaning the residual effect of a past acute event, not an active adverse reaction.