Genetic Modifiers (July 2005)

Why This Topic Matters

Genetic testing reporting can involve multiple related procedures and highly specific test characteristics. This article matters because it explains the structure of the CPT modifier approach used to capture that specificity in genetics-related laboratory claims and documentation.

Article Sections

1. July 2005 pages 1-8

   Introductory material for the July 2005 article and its scope within CPT Assistant.

2. Why New Modifiers?

   Background on the need for a modifier-based approach in genetics-related laboratory reporting and the broader context for CPT code structure.

3. Reporting Solution: Genetic Modifiers

   Overview of the modifier framework and its intended role in supporting more specific genetic test reporting and claim processing.

4. How to Use CPT Genetic Modifiers

   General explanation of the modifier system layout, how the framework is organized, and the types of CPT code families it was designed to accompany.

5. Clinical Example 1

   A worked laboratory scenario illustrating use of the modifier framework in a hereditary thrombosis-related genetic testing context.

6. Rationale

   Discussion accompanying the first clinical example that explains the reporting approach in that scenario.

7. Clinical Example 2

   A second laboratory scenario involving hereditary cancer-related genetic testing and the associated reporting framework.

8. Rationale

   Discussion accompanying the second clinical example and the related reporting approach.

9. Table 1

   A reference list of CPT laboratory codes associated with the genetic modifier article and the related code families.

10. Table 2

    The modifier reference table organized by broad disease categories and gene or mutation groupings.

11. Glossary

    Definitions of core genetics and cytogenetics terminology used in the article.