AHA Coding Clinic® for ICD-9 - 1997 Fourth Quarter
Pyoderma Gangrenosum
Prior to October 1, 1997, Pyoderma gangrenosum was indexed to code 686.0, Pyoderma. New codes have been created to distinguish pyoderma gangrenosum from other pyodermas. Pyoderma gangrenosum is characterized by relatively indolent ulcers with extensive necrosis around the edges of the lesions. While pyoderma gangrenosum may be an isolated finding, it is frequently a cutaneous manifestation of an underlying systemic disease. It is most often associated with ulcerative colitis or Crohn's disease. The ulcers are often multiple, are generally on the lower extremities and may cover large areas of the leg. The ulcers have ragged bluish-red overhanging edges...
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Article Overview
This article covers a coding update for pyoderma gangrenosum within ICD-9-CM, along with a clinical overview of the condition and its relationship to underlying systemic disease. It is intended for coders and clinicians who need to understand the scope of the diagnosis topic, the affected skin-infection code family, and the related example involving inflammatory bowel disease.
Why This Topic Matters
The page helps readers recognize that pyoderma gangrenosum was separated from a broader skin infection category and place the condition in its broader clinical context. That matters for accurate diagnosis indexing, documentation review, and understanding how the topic is represented in the ICD-9-CM code set.
Article Sections
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Clinical overview of pyoderma gangrenosum
Summarizes the condition’s general presentation, patterns of lesions, and its association with systemic disease. Also notes broad management considerations discussed in the article.
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ICD-9-CM code update
Describes the revised ICD-9-CM placement for the topic and the surrounding code family that was updated to distinguish related conditions.
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Coding example
Provides a short scenario involving pyoderma gangrenosum and an underlying gastrointestinal condition to illustrate the article’s coding context.
What You Will Learn
- How pyoderma gangrenosum is distinguished from other pyodermas in ICD-9-CM
- Which broader skin infection code family is associated with the topic
- How the article frames the relationship between the skin condition and underlying systemic disease
- How the article uses an example to connect the diagnosis topic with a related gastrointestinal condition
Who Should Read This
- Medical coders
- Coding educators
- Clinical documentation staff
- Physicians and advanced practice clinicians
Codes Discussed
Code Ranges Discussed
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