AHA Coding Clinic® for HCPCS - 2004 Quarter 2
Coding for medical necessity
While the issue of coding for medical necessity may focus on ICD-9-CM diagnosis coding and the focus of this publication is HCPCS coding, we have received many questions in the past few months regarding this topic. Therefore, we are publishing this article as a service to our readers. What is medical necessity? Medicare is required by statute to pay for services that meet medical necessity. This is defined as services and items found to be reasonable and necessary for the diagnosis or treatment of illness or injury, or to improve the functioning of a malformed body member. Types of...
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Article Overview
This article explains the Medicare concept of medical necessity and the role of national and local coverage policy in coding and claim review. It is aimed at coders, billers, compliance staff, and providers who need a general understanding of how coverage databases, truncation issues, symptom reporting, screening scenarios, and payer disputes are discussed in Medicare-related coding guidance. The article also outlines the kinds of coding information that may appear in local coverage guidance and how coverage information is organized and searched in Medicare resources.
Why This Topic Matters
Understanding the relationship between medical necessity and coverage policy helps readers assess whether a service may be supported by Medicare guidance and where coding questions arise. The topic is especially relevant when coding guidance, local coverage language, and payer policies do not align.
Article Sections
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What is medical necessity?
Defines the Medicare medical necessity concept at a high level and places it in the context of covered services and items.
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Types of Medicare coverage policies
Introduces national and local coverage policy types and describes the organizations involved in creating and applying them.
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Role of coding in LMRPs
Summarizes the kinds of coding-related elements that may appear in local coverage guidance and how they relate to service review.
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Medicare coverage database
Describes the Medicare Coverage Database and the ways it can be searched for national and local coverage information.
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Truncated codes
Discusses the issue of incomplete diagnosis codes and the general expectation for complete code specificity in coverage documents.
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Coding of presenting complaints
Addresses how symptoms or presenting complaints may be discussed in relation to diagnosis reporting and claim form fields.
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Coding of symptoms vs. definitive diagnoses
Reviews general diagnostic coding guidance for outpatient encounters, including how confirmed findings and symptoms are handled conceptually.
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Coding of screening tests
Explains screening as a coding scenario and places it in the broader context of testing without signs or symptoms.
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Revising NCDs and LMRPs
Covers notice, comment, and reconsideration processes for changes to Medicare coverage policies.
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Coding Disputes with Payers
Provides general guidance on resolving disagreements between payer policies and coding rules, including documentation and escalation concepts.
What You Will Learn
- How Medicare defines medical necessity in broad terms
- How national and local coverage policies differ
- What kinds of coding information may appear in local coverage guidance
- How the Medicare Coverage Database is used to locate coverage information
- Why complete code specificity can matter in coverage-related reviews
- How symptom, screening, and definitive diagnosis topics are discussed in coding guidance
- How changes to coverage policies are reviewed and reconsidered
- How payer disputes involving coding and coverage are typically approached
Who Should Read This
- Medical coders
- Medical billers
- Compliance staff
- Revenue cycle professionals
- Healthcare providers
- Practice administrators
Codes Discussed
Code Ranges Discussed
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