AHA Coding Clinic® for ICD-9 - 2009 Issue 4; VOLUMES 1 & 2 NEW/REVISED CODES
Merkel Cell Carcinoma
Effective October 1, 2009, new codes have been created to uniquely report Merkel cell carcinoma of the skin. Merkel cell carcinoma (which is sometimes referred to as a neuroendocrine carcinoma of the skin) arises from the uncontrolled growth of Merkel cells in the skin. It is a rare skin cancer. Merkel cell carcinoma has the potential to be fatal, and aggressive treatment is warranted. Merkel cell carcinoma does not have a distinguishing appearance. It usually develops on sun-exposed skin (e.g., head, neck, arms) as a painless, firm, flesh-colored to red or blue bump. Many Merkel cell carcinomas are...
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Article Overview
This article covers a coding update for Merkel cell carcinoma of the skin and explains how the condition was newly organized into diagnosis codes effective October 1, 2009. It is relevant to coders, billers, and clinicians working with skin cancer documentation, diagnosis classification, and associated procedure reporting. The article also includes a short applied example illustrating diagnosis and procedure code assignment in a hospital setting.
Why This Topic Matters
Merkel cell carcinoma is a rare and serious skin cancer, and the article clarifies how it was separated into specific diagnosis categories for reporting. This matters for accurate claim submission, diagnosis reporting, and consistent communication among coding professionals handling oncology and dermatology cases.
Article Sections
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Background and clinical context
Provides a general overview of Merkel cell carcinoma, including its broad clinical characteristics and why it is important from a documentation and reporting perspective.
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ICD-9-CM code update effective October 1, 2009
Describes the diagnosis code changes associated with Merkel cell carcinoma and the related grouping structure within the broader classification.
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Clinical example and code assignment
Presents a brief inpatient-style scenario involving Merkel cell carcinoma and summarizes the resulting diagnosis and procedure code reporting.
What You Will Learn
- How Merkel cell carcinoma was addressed in the diagnosis code update
- What general type of classification change was introduced for this condition
- How the article frames a practical coding example involving diagnosis and procedure reporting
- Which broad clinical contexts commonly lead to identification of this skin cancer
Who Should Read This
- Medical coders
- Coding auditors
- Billing staff
- Clinical documentation specialists
- Dermatology and oncology practices
- Hospital coding professionals
Codes Discussed
Code Ranges Discussed
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