I have a question relating to the use of the ABN and the GA modifier, also.
I just attended a Medicare seminar (in Arkansas) and they stated that the GA is only for "waiver of liability" cases, such as sublax codes when not covered for certain diagnosis (such as emphysema, MD, MS or rheumatoid arthritis), when more than one visit is billed for the same day, or they are performed as a maintenance visit. It was also stated that an ABN needed to be signed in these cases, therefore the GA modifier is used.
My confusion comes from the fact that I thought the ABN needed to be signed for any services not covered by Medicare so that the patient knew what they would be responsible for, not just in the above cases.
Am I totally confused, AGAIN?
The more information I get, from so many different sources, the more confused I seem to get. :(
Thank you in advance for any responses.

Cyndi Ploense, CPCDenali Medical Billing, Inc.