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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Article Overview
This brief article describes a diagnosis-specific ICD-9-CM coding change effective October 1, 2008 and situates it within the broader category of iris and ciliary body disorders. It is useful for coders and clinicians who need to identify the relevant diagnosis category and understand the scope of the update.
Why This Topic Matters
It helps users recognize that a previously broader diagnostic category was refined into a more specific code, which is important for accurate diagnosis reporting and record indexing.
What You Will Learn
- The general diagnosis topic addressed by the article
- How the diagnosis fits into a broader ICD-9-CM category
- That a coding update took effect on a specific date
- The clinical context in which the diagnosis is commonly discussed
Who Should Read This
- Medical coders
- Coding auditors
- Ophthalmology clinicians
- Health information management professionals
Codes Discussed
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