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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Skin And Subcutaneous Tissue 680-709 > Other Inflammatory Conditions Of Skin And Subcutaneous Tissue 690-698 > ICD-9-CM Diagnosis 691 Atopic dermatitis and related conditions 691 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 691.0 Diaper or napkin rash A type of irritant dermatitis localized to the area in contact with a diaper and occurring most often as a reaction to prolonged contact with urine, feces, or retained soap or detergent. 691.0 is a specific code that can be used to specify a diagnosis 691.0 contains 14 index entries ICD-9-CM Diagnosis 691.8 Other atopic dermatitis and related conditions A chronic inflammatory genetically determined disease of the skin marked by increased ability to form reagin (IgE), with increased susceptibility to allergic rhinitis and asthma, and hereditary disposition to a lowered threshold for pruritus. It is manifested by lichenification, excoriation, and crusting, mainly on the flexural surfaces of the elbow and knee. In infants it is known as infantile eczema. 691.8 is a specific code that can be used to specify a diagnosis 691.8 contains 22 index entries