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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