AHA Coding Clinic® for ICD-9 - 2008 Issue 4; VOLUMES 1 AND 2 NEW/REVISED CODES

Plateau Iris Syndrome

Effective October 1, 2008, a new code 364.82 has been created to uniquely identify plateau iris syndrome. Prior to this change, this syndrome was assigned to code 364.8, Other disorders of iris and ciliary body. Plateau iris syndrome is caused by an anatomically anterior position of the ciliary processes, which supports the peripheral iris and prevents it from moving backward to open the angle following iridotomy. The ciliary processes form a fixed passage through which the iris thickness must pass and variations in angle opening with dark, light and pilocarpine are entirely due to changes in iris...

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