Modifier 66 fact sheet Surgeons append modifier 66 to claims indicating they were on a team of surgeons performing a specific procedure on the same... July 16, 2025
Modifier 73 fact sheet Use modifier 73 to report discontinued outpatient or hospital ambulatory surgical center (ASC) procedure prior to the... October 30, 2024
Modifier 78 flowchart Use this decision flowchart to assist in correctly applying the 78 modifier. September 15, 2025
Modifier 79 flowchart Use this decision flowchart to assist in correctly applying the 79 modifier. September 15, 2025
Modifier AI The principal physician of record appends modifier “-AI” to their initial hospital care or nursing facility visit code. All... October 31, 2024
Modifiers View details regarding specific modifiers including tips, decision flowcharts, and educational information. March 2, 2026
Modifiers applicable to ambulatory surgical centers (ASCs) Payment for ambulatory surgical centers (ASCs) are made under a separate payment system. As such, certain modifiers are specific... December 9, 2024
MSP and conditional payment request claim filing guidelines Please review this article for details on how to properly bill Medicare secondary payer (MSP) and conditional payment request... October 15, 2024
MSP billing Read this article for more information on billing your claims when Medicare is the secondary payer. March 10, 2026