AHA Coding Clinic® for ICD-9 - 2005 Issue 2; Ask the Editor

Tubulovillous Adenoma with Focal High Grade Dysplasia

This patient had a history of colon polyps and melena and was admitted for a colonoscopy/polypectomy. The final diagnosis was colon polyp with tubulovillous adenoma with focal high-grade dysplasia. When queried for further clarification, the physician stated that this is almost the same as carcinoma in situ, but not quite. What is the appropriate code for high-grade dysplasia of the colon? ...

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