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ICD 10 Coding Alert

Reader Question:
Know This Particular Combo Code

Question: A payer has denied our claim for a pain management office visit with the reason “Missing/Incomplete/Invalid principal diagnosis.” One of the billers is telling me that M51.16 and M51.26 cannot be billed together, but I’ve never seen anything stating this. There is an Excludes 1 for M51.1x, but I don’t see anything for M51.2x. Who is right? Maryland Subscriber [...]