AMA CPT® Assistant - 2008 Issue 11 (November)
Pulmonary Procedures-Code 94720 vs. Code 94725 (November 2008)
November 2008 pages 5-6 Coding Clarification:Pulmonary Procedures-Code 94720 vs. Code 94725 This article will attempt to explain when it is appropriate to report CPT code 94720, Carbon monoxide diffusing capacity (eg, single breath, steady state), and when is it appropriate to report code 94725, Membrane diffusion capacity. The Medicine/Pulmonary/Other Procedures subsection of the 2008 CPT codebook encompass codes 94010-94799, which include pulmonary laboratory procedures and interpretation of test results. Standard batteries of pulmonary function tests include various combinations of individual tests, such as spirometry, flow-volume loop, lung volume(s), diffusion capacity (DLCO), and airway resistance. A simple pulmonary function test...
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Article Overview
This article explains a November 2008 coding clarification for pulmonary function testing, focusing on how two CPT pulmonary diffusion capacity services are distinguished in the context of laboratory testing, interpretation, and billing. It also covers related topics such as standard pulmonary test batteries, testing locations, modifiers, NCCI edits, and diagnostic code support. The content is useful for coders, billers, pulmonary practices, and compliance staff working with respiratory testing claims.
Why This Topic Matters
Accurate reporting of pulmonary function testing affects claim validity, documentation requirements, and whether professional and technical components are billed appropriately. The article helps readers understand the broader coding context for pulmonary laboratory services and the associated administrative considerations.
Article Sections
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Coding Clarification: Pulmonary Procedures
Introduces the article’s focus on pulmonary diffusion capacity services and the general coding question being addressed.
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Pulmonary function test context
Reviews where the services fit within the pulmonary medicine section of CPT and describes common pulmonary function testing components.
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Background on one pulmonary diffusion capacity service
Summarizes the history and clinical context of one diffusion capacity service and its role in pulmonary assessment.
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How the test is measured
Describes the general measurement process, equipment, and standardized measurement considerations for pulmonary diffusion testing.
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Coding Tip
Provides a brief coding-related note about reporting frequency during a testing session.
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Description of the membrane diffusion capacity service
Explains the structure of the second pulmonary diffusion capacity service and its relationship to specialized testing methods.
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Coding implications and payer considerations
Discusses broader reporting and documentation considerations associated with use of the specialized service.
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Coding based on location of tests
Addresses billing when testing and interpretation occur in different settings and notes related modifier and edit considerations.
What You Will Learn
- How the article frames the distinction between two pulmonary diffusion capacity services
- Where these services fit within CPT pulmonary procedure coding
- What general testing and measurement concepts are associated with pulmonary diffusion capacity studies
- Which administrative factors may affect reporting in different care settings
- What documentation and diagnostic support topics are discussed for pulmonary testing claims
Who Should Read This
- Medical coders
- Billing staff
- Pulmonary practice administrators
- Compliance professionals
- Physician office staff involved in respiratory testing claims
Codes Discussed
Code Ranges Discussed
Modifiers Discussed
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