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What is a requirement for billing CPT code 92100 for Serial tonometry?

  1. One measurement per hour

  2. Multiple measurements throughout the day

  3. A single measurement at the appointment

  4. At least two measurements every week

The correct answer is: Multiple measurements throughout the day

The requirement for billing CPT code 92100, which pertains to serial tonometry, is that multiple measurements must be taken throughout the day. This procedure is essential for monitoring intraocular pressure over time, allowing for a more comprehensive assessment of a patient’s ocular condition, particularly in cases such as glaucoma management. Serial tonometry involves taking multiple readings at different times within the same day to observe fluctuations in intraocular pressure, which provides valuable information for diagnosing and managing eye diseases. This approach is critical because single measurements can be misleading due to variations in intraocular pressure that can occur throughout the day. The emphasis on multiple assessments ensures that the clinician can accurately monitor the patient's intraocular pressure, thereby guiding treatment decisions effectively.