Glaucoma secondary to oth eye disord, left eye, severe stage

This code signifies elevated intraocular pressure and optic nerve damage in the left eye, resulting from another underlying ocular condition. The glaucoma has progressed to a severe stage, indicating significant visual field loss and/or optic nerve damage. This is a form of secondary glaucoma, where the primary cause is an identifiable eye disorder other than trauma, inflammation, or medication.

Apply this code when documentation clearly states a diagnosis of secondary glaucoma in the left eye, attributed to an "other eye disorder" (e.g., retinal detachment, intraocular tumor, or iris neovascularization). The medical record must also specify that the glaucoma is in a "severe stage." This code is appropriate when the underlying eye disorder is not specifically classified as inflammatory, traumatic, or drug-induced.

• Ensure the documentation specifies "left eye" and "severe stage" for accurate code assignment.
• Verify the underlying "other eye disorder" is clearly documented and not better classified by a more specific secondary glaucoma code (e.g., H40.4 for inflammatory glaucoma).
• Always sequence the underlying "other eye disorder" code first, followed by this glaucoma code, as the glaucoma is secondary to that condition.