Undifferentiated Somatoform Disorder

A new code has been created effective October 1, 1996, for undifferentiated somatoform disorder. Prior to this date, it was assigned to code 300.81, Somatization disorder. The essential features of undifferentiated somatoform disorder are one or more physical complaints (e.g., fatigue, loss of appetite, gastrointestinal or urinary complaints) that persevere for six months or more. The etiology of these symptoms cannot be fully explained by any known general medical condition or the direct effects of a substance. Undifferentiated somatoform disorder is a residual category for those persistent somatoform presentations that do not meet full criteria for somatization...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article is a brief coding reference about the introduction of a new diagnosis code for undifferentiated somatoform disorder and how it relates to the surrounding ICD-9-CM diagnostic categories. It is relevant to coders and billing staff working with mental health and behavioral health diagnoses, especially those reviewing historical code changes and category placement. The article also outlines related diagnostic groupings and excludes notes within the broader neurotic disorders chapter.

Why This Topic Matters

It helps readers understand a diagnosis code change tied to a specific effective date and where the condition sits in the ICD-9-CM mental health classification hierarchy. That context is important for accurate retrospective coding, record review, and general code set navigation.

Article Sections

  1. Coding update and clinical context

    Summarizes the introduction of a new diagnosis code for this condition and provides a brief overview of the type of presentation being discussed.

  2. ICD-9-CM classification structure

    Shows the surrounding neurotic disorder categories and related somatoform groupings within the code set, including cross-references and exclusion notes.

What You Will Learn

  • How the article frames a diagnosis code change over time
  • Where the condition is placed within the ICD-9-CM mental disorder hierarchy
  • What broader diagnostic categories are discussed alongside the condition
  • How related and excluded diagnostic groupings are presented in the article

Who Should Read This

  • Medical coders
  • Coding auditors
  • Billing staff
  • Behavioral health documentation reviewers
  • Compliance staff

Codes Discussed

  • ICD-9-CM: 300
  • ICD-9-CM: 300.7
  • ICD-9-CM: 300.8
  • ICD-9-CM: 300.81
  • ICD-9-CM: 300.82

Code Ranges Discussed

  • ICD-9-CM: 300.10-300.19
  • ICD-9-CM: 296.2-296.3
  • ICD-9-CM: 295.0-295.9

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