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 2027, 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.
Large Plaque Parapsoriasis
A variant of parapsoriasis in which the plaques are large.
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).
Parapsoriasis Lichenoides
A rare condition that stimulated chronic radiodermatitis. It is considered a variant of mycosis fungoides.
Pityriasis Lichenoides et Varioliformis Acuta
A rare skin disorder of unknown etiology that is considered to be a more severe form of pityriasis lichenoides. It is characterized by itchy, burning papular lesions which form open sores with red-brown crusts. Low grade fever, headache, malaise, and arthralgias may occasionally precede or accompany the skin findings.
Small Plaque Parapsoriasis
A variant of parapsoriasis in which the plaques are small.
About the L41 Code Range
Parapsoriasis describes a group of inflamed skin eruptions with scaly spots and bumps. Their cause is unknown, and they are distinct from psoriasis.
The subdivisions separate pityriasis lichenoides, a subgroup of parapsoriasis, into acute L41.0 and chronic L41.1 forms. Other subdivisions identify small-plaque L41.3, large-plaque L41.4, and retiform L41.5 parapsoriasis. The category also has codes for other L41.8 and unspecified L41.9 parapsoriasis.
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, 2026 through September 30, 2027. 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 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
