REVISITING MODIFIER 52, 73, and 74

The Central Office on HCPCS has received many inquiries regarding the appropriate use of Modifier 52, Reduced Services. There appears to be some confusion among coders concerning previously published guidance on the appropriate appending of Modifier 52 to CPT procedure codes. The issue involves the use of Modifier 52 when the procedure is not terminated due to a patient’s circumstance but is actually completed, meaning that the intended procedure was performed. There have been several Question & Answers (Q&As) published in our quarterly HCPCS newsletter regarding the appropriate reporting of modifier 52; however, we continue to receive...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article explains how CMS and AMA guidance differ for modifiers used when a procedure is reduced, cancelled, or discontinued, especially in the hospital outpatient setting. It is intended for coders, billing staff, and compliance professionals who need to understand how discontinuation guidance changed and where the relevant CMS references are found.

Why This Topic Matters

Accurate modifier reporting affects how interrupted or reduced procedures are documented in claims and facility billing. This topic matters because the article highlights differences between general CPT guidance and CMS-specific guidance, along with a cited manual reference for further review.

Article Sections

  1. Overview of Modifier 52 Guidance

    Introduces the topic of modifier use for reduced services and describes why clarification was needed. It also frames the discussion around differences in published guidance.

  2. AMA Guidance for Modifier 52

    Summarizes the general guidance cited from the American Medical Association regarding reduced services. The section focuses on the broader reporting context for the modifier.

  3. CMS Guidance Before and After January 1, 2012

    Describes the CMS guidance changes and identifies the effective date for the revised language. It also places the update in the context of outpatient service reporting.

  4. Modifiers 73 and 74

    Reviews the related facility modifiers discussed alongside modifier 52 and explains the setting in which they are addressed. The section compares the general circumstances associated with discontinued services.

  5. Reference to CMS Manual Guidance

    Points readers to the cited CMS manual source for additional information. It identifies the publication and chapter location referenced in the article.

  6. Example and Response

    Presents a billing scenario involving a planned procedure and discusses the related reporting question. The section connects the example to the general modifier guidance discussed earlier.

What You Will Learn

  • How the article frames reduced, cancelled, and discontinued service reporting
  • Why CMS and AMA guidance are discussed separately
  • What changed in the CMS guidance effective in 2012
  • How the article relates modifier use to the hospital outpatient setting
  • Where the article directs readers for additional CMS reference material

Who Should Read This

  • Medical coders
  • Hospital outpatient billing staff
  • Compliance professionals
  • Revenue cycle teams
  • Auditing staff

Codes Discussed

  • CPT: 42820-42836

Code Ranges Discussed

  • CPT: 42820-42836

Modifiers Discussed

  • CPT: 52
  • CPT: 73
  • CPT: 74

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