What is the difference between modifiers 52 and 53?

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Please provide the definition and illustration of Modifier 53. (2019)
Please provide the definition and illustration of Modifiers 54, 55 and 56. (2019)
Can Modifier 22, Unusual Procedural Service, be appended to E/M codes? (2007)
Over the years, the CPT Assistant has listed different timeframes when modifier 22 is appended (2020)
May modifier 22, Increased Procedural Services, be appended to add-on codes? (2013)
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AMA CPT® Knowledge Base - Feb 3, 2010

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