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December 2016 Texas Medicaid Provider Procedures Manual

Vision and HearingServices Handbook : 4 Vision Care Professionals : 4.3 Services, Benefits, Limitations, and Prior Authorization : 4.3.5 Vision Testing : 4.3.5.6 Gonioscopy

4.3.5.6
A gonioscopy consists of an eye examination to look at the front part of the eye (anterior chamber) between the cornea and the iris. A microscope (slit lamp) is used to look inside the eye.
Procedure code 92020 may be reimbursed for gonioscopy when billed with one of the diagnosis codes in the following table:
 

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