Which denial codes appear with M15?

M15 commonly rides with CO 97, CO 236. The adjustment code says the claim was reduced; the remark code says why.

Remark code

M15 denial code

Services billed separately were bundled, because the payer considers them components of one procedure.

Usually an appeal

A remark code is not the denial. The adjustment code says the claim was reduced. This one says why. You need both to know what to send back.

What to do

Look up whether an edit pair exists and whether its modifier indicator allows an override at all. Where the indicator is 0 it cannot be unbundled and no appeal will change that.

Codes it appears with

M15 commonly rides alongside these. Our reading, not a published mapping: X12 publishes no adjustment-to-remark table.

Code	What that one means
CO 97	The payer says this is already paid inside another service.
CO 236	This procedure and another one billed the same day cannot be billed together under NCCI.

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