Other lichen, not elsewhere classified

This code represents various forms of lichenoid skin eruptions that do not fit into more specific categories of lichen planus or other defined lichenoid disorders. These are inflammatory conditions characterized by small, itchy, flat-topped papules that can appear on the skin, hair, nails, or mucous membranes. The "other" designation indicates a less common or atypical presentation.

Apply this code when documentation specifies a diagnosis of lichen that is not clearly identifiable as lichen planus (e.g., lichen nitidus, lichen striatus, lichen sclerosus et atrophicus) and is not otherwise classified. This code is appropriate when the provider's diagnosis explicitly uses terms like "other lichen," "atypical lichenoid dermatitis," or "lichenoid reaction, not otherwise specified."

• Ensure the physician's documentation clearly states a form of lichen not covered by more specific ICD-9 codes.
• Avoid using this code if a more precise diagnosis, such as lichen planus (697.0) or lichen sclerosus (701.0), is documented.
• Review the medical record for any associated systemic conditions or drug reactions that might be contributing to the lichenoid eruption, as these may require additional coding.