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  5. Papulosquamous disorders in diseases classified elsewhere (L45)

Papulosquamous disorders in diseases classified elsewhere (L45)

The ICD-10 code L45 is used to classify papulosquamous disorders that occur as part of other diseases rather than standalone skin conditions. This code specifically applies when these skin issues are linked to diseases classified elsewhere in the ICD-10 system.

Papulosquamous disorders are characterized by scaly, raised skin lesions and can appear in various disease contexts. The ICD-10 code for papulosquamous disorders in diseases classified elsewhere (L45) helps health professionals document cases where these skin symptoms are secondary to underlying conditions rather than primary dermatologic diseases. Although synonyms are not listed, the term “papulosquamous” typically includes conditions like psoriasis and lichen planus when they arise due to or alongside other systemic illnesses. Using this code allows accurate coding and treatment planning by recognizing that the skin disorder is associated with a broader diagnosis recorded under a different code.

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • underlying disease.