CPT® Code 92100

Serial tonometry (separate procedure) with multiple measurements of intraocular pressure over an extended time period with interpretation and report, same day (eg, diurnal curve or medical treatment of acute elevation of intraocular pressure)

Serial tonometry, as defined by CPT® Code 92100, is a diagnostic procedure utilized to measure the intraocular pressure (IOP) within the eye. This procedure is particularly significant in the evaluation and management of conditions such as glaucoma, where monitoring IOP is crucial for assessing the risk of optic nerve damage. The process involves taking multiple measurements of the intraocular pressure over an extended time period, typically within the same day, to create a comprehensive profile of pressure fluctuations, often referred to as a diurnal curve. This curve helps in identifying peak pressures and acute elevations that may require medical intervention. Various techniques are employed in serial tonometry, including Goldmann's tonometry, which is the most widely accepted method. This technique involves flattening a specific area of the cornea while applying a known force to measure the pressure. Other methods include applanation tonometry, which requires the use of a topical anesthetic and a disinfected prism to accurately gauge pressure, and Perkins tonometry, a portable option suitable for children or patients who cannot be examined using a slit lamp. Each method provides valuable insights into the intraocular pressure dynamics, aiding healthcare professionals in making informed decisions regarding treatment and management of ocular conditions.