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Modifier AI

December 23, 2025
The principal physician of record appends modifier “-AI” to their initial hospital care or nursing facility visit code. All other physicians who perform an initial evaluation on this patient bill without modifier "-AI" to indicate specialty…

Modifier 50

December 23, 2025
Modifier 50 applies to bilateral procedures performed on both sides in the same operative session, except as indicated. Avoid claim denials and future appeals due to incorrect claim submissions by properly applying modifier 50 when these in…

Anatomical modifiers

December 23, 2025
Procedures performed during separate patient encounters, at separate anatomic sites, or on separate specimens, may require a modifier be reported. Avoid claim denials or appeals due to incorrect claim submissions by properly applying anatom…

Utilizing modifier 91: Repeat clinical laboratory tests

December 23, 2025
View this article for instructions on how and when to use modifier 91.

Postoperative co-management -- modifiers 54 and 55

December 23, 2025
When physicians transfer the care of the patient during the global care period, the use of a modifier will be necessary to distinguish who is providing care for the patient. This article explains how to properly apply modifiers when these i…

Modifier 73 fact sheet

December 23, 2025
Use modifier 73 to report discontinued outpatient or hospital ambulatory surgical center (ASC) procedure prior to the administration of anesthesia.

Modifier 53 fact sheet

December 23, 2025
To avoid claim denials and future appeals due to these incorrect claim submissions, we’re providing guidance on how to properly submit a claim when applying this modifier.

UB-04 billing information

December 23, 2025
The Official UB-04 Data Specifications Manual 2025, copyrighted by the American Hospital Association, is the only official source of UB-04 billing information adopted by the National Uniform Billing Committee (NUBC).

Bilateral indicators

December 23, 2025
The Medicare physician fee schedule status indicators for bilateral services should be used to determine if the procedure is allowed to be performed bilaterally.

Reporting place of service (POS) codes

December 23, 2025
The place of service (POS) is required on all health insurance claims submitted to Medicare Part B contractors.
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