Question: We had a patient present with high intraocular pressure, a symptom of glaucoma, and the ophthalmologist decided to perform a visual field (VF) examination. The results of the visual field were normal, and the doctor ruled out the possibility of glaucoma. Which diagnosis code should I link to the VF procedure? Minnesota Subscriber Answer: In this case, the appropriate diagnosis code is 365.01 (Borderline glaucoma [glaucoma suspect]; open angle with borderline intraocular pressure or cupping of optic disks). Some payers require 365.00 (Preglaucoma, unspecified) when the diagnostic testing does not confirm glaucoma. Your best bet is to check with your local carrier to determine if billing guidelines exist. But if a patient presents with signs and symptoms of glaucoma, and a VF confirms the condition, you should report the code for the confirmed diagnosis. For example, if you perform visual fields for a patient who presents with high intraocular pressure, open angles, and the VFs confirm the presence of small scotomas in the areas of the VF important in glaucoma, the diagnosis code should be linked to the appropriate glaucoma diagnosis, in this case 365.10 (Open-angle glaucoma, unspecified). Scotomas in other areas may suggest another diagnosis. Diagnosis code 365.10 is appropriate for the following VF examination codes: • 92082 -- intermediate examination. • 92083 -- extended examination. The extended procedure, 92083, is more appropriate because it is more complete.
• 92081 -- Visual field examination, unilateral or bilateral, with interpretation and report; limited examination.