Papulosquamous disorders (L40-L45) ICD-10-CM
The L40–L45 section covers papulosquamous disorders with 40 ICD-10-CM diagnosis codes, of which 35 are billable in fiscal year 2027. The section is organized into the 6 code ranges listed below.
Code Ranges in This Section 6 ranges · 40 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the L40–L45 Code Range
These skin disorders include psoriasis, which causes dry, red, scaly patches, and parapsoriasis, a separate group of scaly eruptions. Pityriasis rosea causes salmon-colored spots and bumps. Lichen planus causes itchy, flat-topped purple bumps on skin or mucous membranes.
L40 separates forms of psoriasis, including generalized pustular, guttate and arthropathic psoriasis. L41 separates forms of parapsoriasis, including small-plaque and large-plaque forms. L42 identifies pityriasis rosea. L43 separates forms of lichen planus and includes a lichenoid drug reaction. L44 groups other named papulosquamous disorders, while L45 identifies papulosquamous disorders in diseases classified elsewhere.
Questions About This Page
How many codes are in the L40-L45 range?
The L40-L45 range contains 40 ICD-10-CM diagnosis codes in FY 2027. 35 of them are billable, and the rest are category headers that organize the section.
What conditions does L40-L45 cover?
The range covers papulosquamous disorders. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
