AHA Coding Clinic® for HCPCS - 2014 Issue 2
Proper use of modifier 59
This is a special edition article provided by the Centers for Medicare & Medicaid Services (CMS) for further clarity of existing policy regarding the proper use of modifier 59. On June 2, 2014, modifications were made to Examples 8 and 11 of the article with all of the other information remaining the same. As the Central Office on HCPCS continues to receive coding inquiries regarding modifier 59 we decided to present this article in its entirety as published by the Medicare Learning Network® (MLN). The Medicare National Correct Coding Initiative (NCCI) includes Procedure-to-Procedure (PTP) edits that define when two...
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Article Overview
This article explains Medicare’s policy background for modifier 59 and its relationship to NCCI procedure-to-procedure edits, CCMIs, and other NCCI-associated modifiers. It is aimed at coders, billing staff, and providers who need a clearer understanding of when modifier 59 may be supported by documentation and when another modifier or no modifier is more appropriate. The article also includes a series of illustrative examples across different procedure combinations and encounter types.
Why This Topic Matters
Modifier 59 is frequently misapplied, and misuse can affect claim processing and payment. Understanding the policy framework and the broad categories of scenarios discussed in the article helps organizations reduce avoidable denials and improve coding consistency.
Article Sections
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Overview of NCCI and modifier 59
Introduces the CMS and Medicare policy context for modifier 59 and its relationship to NCCI edits and related modifiers. Summarizes the general purpose of the guidance.
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Examples of Modifier 59 Usage
Provides illustrative scenarios showing broad categories of procedure pairings and encounter situations discussed in the article. The examples are intended to clarify when the topic applies across different clinical settings.
What You Will Learn
- How modifier 59 fits within the Medicare NCCI framework
- The general categories of situations addressed in the guidance
- Why documentation and encounter context matter for modifier selection
- What types of examples are used to illustrate proper and improper application
Who Should Read This
- Medical coders
- Billing and reimbursement staff
- Compliance teams
- Physicians and other providers
- Revenue cycle managers
Codes Discussed
Modifiers Discussed
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