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Anesthesia Coding:

Find Clarity on When to Use Unlisted Procedure Code

Published on Wed Oct 28, 2026

Question: When is it appropriate to report CPT® code 64450 versus 64999? Codify Subscriber Answer: First, let’s look at the code descriptors for these codes: 64450 (Injection(s), anesthetic agent(s) and/or steroid; other peripheral nerve or branch) 64999 (Unlisted procedure, nervous system) The most important distinction is in the descriptor for 64450. Use this code for injections in any peripheral nerve [...]
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