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Neurosurgery Coding Alert

Reader Questions:

Count +22851 by Interspace

Published on Sun Mar 21, 2010

Question: I've always been of the understanding that you should bill +22851 per interspace. One of our payers rejected a claim with multiple units of +22851, stating it was a duplicate charge. Have there been changes we need to know? Connecticut Subscriber Answer: You are correct in reporting +22851 (Application of intervertebral biomechanical device[s] [e.g., synthetic cage{s}, threaded bone dowel{s}, methylmethacrylate] to vertebral defect or interspace [List separately in addition to code for primary procedure]) for each interspace treated. For example, if the surgeon treats L3-L4 and L4-L5, you'll report one unit of +22851 for L3-L4 and one unit +22851 with modifier 59 (Distinct procedural service) for L4-L5. Ensure that your surgeon documents that he places cages or other prosthetic devices in each interspace.
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