Ocular hypertension, left eye

This code signifies elevated intraocular pressure (IOP) in the left eye without optic nerve damage or visual field loss. It indicates a risk factor for glaucoma, but not active glaucoma itself.

Use this code when documentation specifies ocular hypertension affecting only the left eye, confirmed by tonometry showing elevated IOP. It is appropriate when there are no signs of glaucomatous optic neuropathy or visual field defects.

• Ensure laterality is clearly documented as "left eye" to support this specific code.
• Do not use this code if there is any evidence of optic nerve damage or visual field loss; in such cases, a glaucoma code would be more appropriate.
• Distinguish from H40.051 (ocular hypertension, right eye) and H40.053 (ocular hypertension, bilateral).