Glaucoma secondary to drugs, bilateral, indeterminate stage

This code signifies glaucoma affecting both eyes, where the elevated intraocular pressure and optic nerve damage are directly attributable to the use of a medication. The stage of the glaucoma, indicating its severity or progression, cannot be determined from the available clinical documentation.

Apply this code when documentation explicitly links bilateral glaucoma to drug therapy, and the physician is unable to specify the stage of the disease. This is appropriate when the medical record indicates "drug-induced glaucoma, bilateral, stage unknown" or similar phrasing.

• Ensure documentation clearly states the drug as the causative agent for the glaucoma.
• Do not use this code if the glaucoma is secondary to another underlying condition, such as inflammation or trauma.
• If the stage of glaucoma is known for both eyes, use the more specific bilateral code (H40.63X1-H40.63X3) instead.