Open procedures, laparoscopic and endoscopic rules are procedures defined and coded by area of anatomy investigated.
Flexible Sigmoidoscopy is different from colonoscopy in that it only looks at the rectum and the lower portion of the large intestine, while colonoscopy studies the entire large intestine. Another difference is that sigmoidoscopy does not require sedation or bowel preparation and lavage.
With this information, we can conclude that Open procedures, laparoscopic and endoscopic rules are procedures defined and coded by area of anatomy investigated.
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