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Q&A: Laparoscopy when only open approach documented

Q: When a procedure is performed by laparoscopy, but only a code for the open approach is listed, do you use the unlisted procedure code?

For example, the physician documented: laparoscopic pyloromyotomy, hypertrophic pyloric stenosis.

We used CPT® code 43520-22 (pyloromyotomy, cutting of pyloric muscle, Fredet-Ramstedt type operation, with the increased procedural services modifier) but the coding department corrected with 43659 (unlisted laparoscopy procedure, stomach).

We are a pediatric surgical practice. I feel because the procedures are very common and performed often, our revenue will drop by using unidentified procedure codes, but I want to code them correctly. 

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