Underdosing of opth drugs and preparations, sequela

This code signifies a long-term consequence or complication arising from the patient not receiving enough of an ophthalmological drug or preparation. This underdosing occurred in the past and is now causing a persistent health problem related to the eye or vision.

Apply this code when documenting a current condition that is a direct result of a previous, insufficient administration of an eye medication. Examples include chronic glaucoma progression due to under-treated intraocular pressure, or persistent dry eye syndrome stemming from inadequate past treatment with lubricating drops.

• This "S" seventh character indicates a sequela, meaning the acute underdosing event has passed, and you are coding the residual effect.
• Always code the specific sequela (e.g., chronic glaucoma, corneal scarring) first, followed by this underdosing code.
• Ensure documentation clearly links the current condition to a past underdosing of an ophthalmological agent.