AHA Coding Clinic® for ICD-9 - 2009 Issue 4; VOLUMES 1 & 2 NEW/REVISED CODES
Dysphonia, Hypernasality and Hyponasality
Effective October 1, 2009, subcategory 784.4, Voice and resonance disorders, has been retitled and expanded to create new codes to describe specific disorders such as dysphonia, hypernasality, and hyponasality. Dysphonia is a disorder of phonation (voice production) and is a symptom of a laryngeal disorder affecting the structure and/or function of the larynx. The larynx (voice box) is a framework of cartilage containing vocal cords. These structures vibrate to produce sounds. Traumatic injury, emotional stress, overuse, and illness may cause chronic spasm, weakness, or scarring of the vocal cords. This can affect the vocal cords and voice production...
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Article Overview
This article explains an ICD-9-CM revision to the voice and resonance disorders area, including the creation and revision of diagnosis codes tied to dysphonia and resonance-related conditions. It is useful for coders, auditors, and clinical documentation staff who need to understand the scope of the update and the related terminology changes. The discussion also places the update in the context of head and neck symptom coding and the effective date of the revision.
Why This Topic Matters
Accurate diagnosis coding depends on staying current with classification updates and knowing which terms were added, revised, or removed. This article helps readers recognize the impacted ICD-9-CM code family and the documentation themes associated with voice and resonance disorders.
Article Sections
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Overview of the ICD-9-CM update
Introduces the effective-date change and the portion of the classification system affected by the revision.
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Clinical background on dysphonia and resonance disorders
Provides a general medical overview of voice production and resonance-related disorders and the body structures involved.
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ICD-9-CM code revisions and deletions
Summarizes the affected diagnosis code area, including new, revised, and deleted terminology within the update.
What You Will Learn
- The scope of an ICD-9-CM update affecting voice and resonance disorders
- The general clinical concepts behind dysphonia and resonance-related conditions
- Which parts of the diagnosis classification were revised or retired in the update
- The relevance of the October 1, 2009 effective date
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation improvement staff
- Billing staff
- Healthcare providers
Codes Discussed
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