Question: If an eligible patient presents for a glaucoma screening, and testing reveals increased intraocular pressure, should I report the IOP diagnosis code or the screening diagnosis code with G0117 (Glaucoma screening for high-risk patients furnished by an optometrist or ophthalmologist)? Oklahoma Subscriber Answer: When submitting claims for screenings, unlike diagnostic tests, you should not report diagnosis codes based on the test's findings; you have to submit the diagnosis code that indicates to the carrier that the patient presented without symptoms for a screening. So even if a patient presents for a glaucoma screening and the ophthalmologist finds concrete symptoms of glaucoma, such as the elevated intraocular pressure you describe, you should still link V80.1 (Special screening for neurological, eye, and ear diseases; glaucoma) to G0117. Don't forget that to report G0117, you must meet the following requirements: -- Answers to Reader Questions and You Be the Expert contributed by David Gibson, OD, FAAO, practicing optometrist in Lubbock, Texas.