Adverse effect of opth drugs and preparations, subs

This code indicates a patient is experiencing an undesirable or harmful reaction to a medication specifically used for eye conditions, and this encounter is for ongoing management or follow-up of that adverse effect. The reaction is not due to an overdose, poisoning, or incorrect administration, but rather a known side effect of the drug.

Apply this code when a patient presents for follow-up care, monitoring, or treatment of an adverse reaction to an ophthalmic drug (e.g., glaucoma drops, antibiotic eye drops, steroid eye drops) that was appropriately prescribed and administered. This includes situations where the patient is experiencing chronic side effects or requiring continued management after the initial acute reaction.

• Always sequence this code after the code for the specific adverse effect (e.g., conjunctivitis, blurred vision).
• Ensure the documentation clearly states the encounter is for an "adverse effect" and not a poisoning or underdosing.
• Confirm the encounter is a "subsequent encounter" (D) and not an initial (A) or sequela (S) encounter.