CPT® Code 92130

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Tonography with water provocation, as denoted by CPT® Code 92130, is a specialized diagnostic procedure aimed at measuring intraocular pressure (IOP) within the eye. This procedure is particularly significant in the context of diagnosing conditions such as glaucoma, where abnormal pressure levels can lead to optic nerve damage and vision loss. The aqueous humor, a clear fluid in the anterior chamber of the eye, plays a crucial role in maintaining intraocular pressure by continuously draining through the eye's drainage system. In this procedure, the patient undergoes a fasting period, after which baseline pressure measurements are taken. Subsequently, the patient consumes a quart of water, which is intended to provoke a physiological response that may alter the intraocular pressure. Following this water intake, the changes in IOP are meticulously recorded using a tonometric instrument, allowing the physician to assess the eye's response to the fluid intake. The physician then compiles these findings into a comprehensive written report, which is essential for determining the presence and severity of conditions like glaucoma.