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Gastroenterology Coding Alert

You Be the Expert:

Know When Modifier PT Is Required

Question: In your last issue, you discussed coding for a screening colonoscopy turned diagnostic and mentioned the use of modifier PT (Colorectal cancer screening test converted to diagnostic test or other procedure). Can you explain specifically when modifier PT is necessary and when it isn't? Subscriber Answer: Modifier PT tells the Medicare contractor that the service started as a screening procedure [...]