May modifier 22, Increased Procedural Services, be appended to add-on codes?

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May modifier 22, Increased Procedural Services, be appended to add-on codes? (2012)
Over the years, the CPT Assistant has listed different timeframes when modifier 22 is appended (2020)
Can I append modifier 22 to an E/M service? (2010)
May modifier 22, Increased Procedural Services, be appended to add-on codes? (2013)
When is it appropriate to append modifier 51? (2010)
In Appendix A of the 2008 CPT codebook, the explanatory language of modifier 25, Significant (2008)
Who decides when and if it is appropriate to append Modifier 52, Reduced services? (2007)
Please provide the definition and illustration of Modifier 51. (2019)
When I report a code from the special services, procedures and reports (99000 (REVISED IN (2015)
Please provide the definition and illustration of Modifier 22. (2019)
Can Modifier 22, Unusual Procedural Service, be appended to E/M codes? (2007)
Please provide the definition and illustration of Modifier 32. (2019)

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AMA CPT® Knowledge Base - Aug 2, 2012

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