How should modifier 59 be reported under the National Correct Coding Initiative (NCCI) program?
Modifier 59 is used to indicate a "distinct procedural service". (See Modifier 59 article at https://www.cms.gov/Medicare/Coding/NationalCorrectCodInitEd/index.html for information about proper use of modifier 59.) Modifier 59 may not be appended to the evaluation and management (E&M) services Current Procedural Terminology (CPT) codes 99201-99499 or radiation treatment management CPT code 77427. (FAQ11258)