Parapsoriasis (L41) ICD-10-CM
The L41 code range covers parapsoriasis with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- poikiloderma vasculare atrophicans L94.5
Codes in the L41 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L41 range.
Parapsoriasis
The term applied to a group of relatively uncommon inflammatory, maculopapular, scaly eruptions of unknown etiology and resistant to conventional treatment. Eruptions are both psoriatic and lichenoid in appearance, but the diseases are distinct from psoriasis, lichen planus, or other recognized dermatoses. Proposed nomenclature divides parapsoriasis into two distinct subgroups, PITYRIASIS LICHENOIDES and parapsoriasis en plaques (small- and large-plaque parapsoriasis).
Pityriasis Lichenoides
A subgroup of PARAPSORIASIS itself divided into acute and chronic forms. The acute form is characterized by the abrupt onset of a generalized, reddish-brown, maculopapular eruption. Lesions may be vesicular, hemorrhagic, crusted, or necrotic. Histologically the disease is characterized by epidermal necrolysis. The chronic form shows milder skin changes with necrosis.
About the L41 Code Range
ICD-10 code L41 covers a group of skin conditions collectively known as parapsoriasis, which are chronic inflammatory disorders affecting the skin’s appearance and texture. These codes are used to classify specific types and variations of parapsoriasis for medical diagnosis and billing.
The ICD-10 code for parapsoriasis includes several subtypes, such as L41.0 for pityriasis lichenoides et varioliformis acuta (also known as pityriasis lichenoides or parapsoriasis varioliformis), which is an acute inflammatory skin condition. L41.1 identifies pityriasis lichenoides chronica, a more chronic form. Codes L41.3 and L41.4 specify small and large plaque parapsoriasis, respectively—named for the size of scaly plaques on the skin. L41.5 refers to retiform parapsoriasis, a pattern variant of large plaque parapsoriasis. The code L41.8 addresses other forms such as parapsoriasis atrophicans or herpetiformis. Lastly, L41.9 is used when parapsoriasis is diagnosed but not specified further. Using these specific codes helps healthcare providers accurately document and treat these distinct inflammatory skin disorders.
Questions About This Page
How many billable codes are in the L41 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the L41 range classify?
The range classifies parapsoriasis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
