CPT procedure code
CPT 43645: Laparoscopic gastric bypass with small intestine reconstruction
Procedure code with common scenarios, denial patterns, and appeal guidance.
Code
43645
Category
surgery
Common scenarios
- Lap gastric bypass + SI
- Lap gastric bypass + SI recon
Common denial patterns
- Missing PA where required
- Wrong POS or modifier
Frequently asked questions
What is CPT 43645?
Laparoscopic gastric bypass with small intestine reconstruction
When is it typically billed?
Lap gastric bypass + SI; Lap gastric bypass + SI recon.
What are common denial reasons?
Missing PA where required; Wrong POS or modifier.
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