Pain Management Coding Alert

Reader Question:

Use These G Modifiers for ABN Success

Published on Tue Oct 16, 2018

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Question: I’m filing a claim that includes an advance beneficiary notice (ABN) for a Medicare patient. I know that we need to include a modifier to indicate that we sent out ABN, but I cannot find them anywhere. Could you give me a rundown of the ABN modifiers?

Tennessee Subscriber

Answer: In short, an ABN is a document that you provide to a Medicare patient ahead of a service or procedure if you think that Medicare might not pay for part, or all, of a service. The ABN is meant to give the patient as much information as possible before deciding whether to proceed with a treatment.

When you issue an ABN, it can be prompted by a number of situations. Medicare designed the following modifiers to make clearer why the provider issued the ABN:

GA (Waiver of liability statement issued as required by payer policy, individual case): Use this modifier when you issue a mandatory ABN for a service as required, and it is on file.
GX (Notice of liability issued, voluntary under payer policy): Use this modifier when you issue a voluntary ABN for a service Medicare never covers because it is statutorily excluded, or is not a Medicare benefit.
GY (Item or service statutorily excluded, does not meet the definition of any Medicare benefit or, for non-Medicare insurers, is not a contract benefit): Use this modifier to report that Medicare statutorily excludes the item or service; or the item or service does not meet the definition of any Medicare benefit.
GZ (Item or service expected to be denied as not reasonable and necessary): Use this modifier when you expect Medicare to deny payment of the item or service due to a lack of medical necessity, and no ABN was issued.