Coding

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Modifier 78 flowchart

Use this decision flowchart to assist in correctly applying the 78 modifier

Modifier 22 fact sheet

Effective August 31, 2023, documentation is required for claims submitted with modifier 22. To avoid claim rejects and future appeals due to incorrect claim submissions, we’re providing guidance on…

Modifier 52 fact sheet

Effective August 31, 2023, documentation is required for claims submitted with modifier 52. To avoid claim rejects and future appeals due to incorrect claim submissions, we’re providing guidance on…

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 patient during the same operative session. Billing modifier 66 requires…

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 patient during the same operative session. Billing modifier 66 requires…

Appropriate use of assistant at surgery modifiers and payment indicators

Here is clarification on the appropriate use of modifiers to report assistant at surgery services and how payment is determined under the Medicare physician fee schedule (MPFS).

UB-04 billing information

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…

Modifier 53 fact sheet

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.

Anatomical modifiers

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…

Utilizing modifier 91: Repeat clinical laboratory tests

View this article for instructions on how and when to use modifier 91.