Imaging for L5, S1, S2, S3 Nerve Blocks

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I an new to pain management and would appreciate some insight to this issue.

When we do a L5, S1, S2, S3 Nerve Block, my physician is also charging 77003. If I check the CCI edits, 77002 is bundled, but 77003 is not. I have also see some coders using 77002 OR 77003. Some payers are paying and others are not. I know that imaging is included in some procedure and if 77002 is the correct for this procedure, then it is bundled. Any advice would be greatly appreciated.

Imaging for L5, S1, S2, S3 Nerve Blocks