Lansey, Debra “Learn Proper Coding for Modifiers 59 and 25” ACP Internist online
https://acpinternist.org/archives/2012/07/coding.htm. Accessed 10/4/2022
Author Unknown “2022-List of All CPT Modifiers (2022). Coding Ahead
Online access. https://www.codingahead.com/list-of-modifiers/ Accessed 10/4/2022
Author Unknown “Modifiers 59, 25, and 91: A Guide for Coders”. Continuum
Online access https://www.carecloud.com/continuum/modifier-59-25-91-guide-coders/ Accessed 10/4/2022