AMA CPT® Assistant - 1991 Issue 1 (Spring)
Modifiers (Spring 1991)
Spring 1991 page 7 Coding Commentary Modifiers The CPT system uses modifiers as an integral part of the nomenclature system. This article will address the use of modifiers: when to use modifiers, and how to report modifiers. Definition - A modifier provides the means by which the reporting physician can indicate that a service or procedure that has been performed has been altered by some specific circumstance but not changed in its definition or code. Modifiers may be used in many instances. Some examples are: To report a service has been increased or reduced. To describe a service or...
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Article Overview
This Spring 1991 coding commentary explains how CPT modifiers are presented, reported, and applied in general terms. It is aimed at coders, billing staff, and physicians who need to understand modifier usage across CPT sections and recognize common modifier reporting formats and exceptions. The article also highlights selected modifier topics discussed in the issue and the broader CPT framework they belong to.
Why This Topic Matters
Modifier reporting affects how procedures and services are communicated on claims, so understanding the article can help readers interpret standard CPT modifier usage and related documentation expectations.
Article Sections
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Coding Commentary
Introduces the topic and explains the article’s focus on CPT modifiers and reporting practices.
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Definition
Provides a general overview of what modifiers are intended to indicate within the CPT system.
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How to report modifiers
Describes the general formats used to report modifiers and notes that payer preferences may vary.
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Unusual Services -22
Discusses one commonly referenced modifier topic and the surrounding documentation considerations.
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Reduced Services -52
Discusses another commonly referenced modifier topic and general circumstances associated with reduced reporting.
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Reference Laboratory-90
Covers a laboratory-related modifier topic and the general reporting context for outside laboratory services.
What You Will Learn
- How CPT modifiers are generally introduced in coding commentary
- The basic ways modifiers may be reported
- Why certain modifier topics are commonly discussed in CPT guidance
- How modifier discussion is organized across CPT sections
- The general context for several commonly referenced modifier topics
Who Should Read This
- Medical coders
- Billing staff
- Physicians
- Coding educators
- Practice managers
Codes Discussed
Modifiers Discussed
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