AMA CPT® Assistant - 1997 Issue 12 (December)

The Whitaker Test (December 1997)

December 1997 pages 7-9 Coding Communication The Whitaker Test Actual structural causes of dilation of the renal collecting system include urinary stones, tumors or complications of prior surgery. However, dilatation of the renal collecting system can also be seen without a functional or structural obstruction in patients following surgery, following a now relieved obstruction, or with congenital variations. The distinction between dilatation with obstruction and dilatation without obstruction is important as obstruction can lead to decreased kidney function and infection. In patients with an enlarged or dilated kidney, the distinction between an obstructed urinary system and a nonobstructed urinary...

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CPT® Assistant content is the official source for CPT® coding guidance. It is an instrumental tool when appealing insurance denials and validating coding to auditors. Monthly issues and an extensive archive provide comprehensive guidance on proper CPT® coding for past, present and upcoming code set releases. Archives date back to 1990 for historical use of codes, changes, rationales, coding tips and trends in the industry.

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