Pityriasis rosea (L42) ICD-10-CM
The L42 code range covers pityriasis rosea with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the L42 Range 1 codes · 1 billable
- L42 Pityriasis rosea
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L42 range.
Pityriasis Rosea
A mild exanthematous inflammation of unknown etiology. It is characterized by the presence of salmon-colored maculopapular lesions. The most striking feature is the arrangement of the lesions such that the long axis is parallel to the lines of cleavage. The eruptions are usually generalized, affecting chiefly the trunk, and the course is often self-limiting.
About the L42 Code Range
ICD-10 code L42 is assigned to pityriasis rosea, a specific inflammatory skin condition. This code helps medical professionals identify and document this distinct skin disorder accurately in health records.
Pityriasis rosea (sometimes called pityriasis rosea-like drug eruption) is characterized by a rash that typically begins with a single large patch followed by smaller lesions. The ICD-10 code for pityriasis rosea, L42, is used exclusively for this condition within the "other specified inflammatory condition of skin" category. By linking common names such as pityriasis rosea and its drug eruption variant to the L42 code, healthcare providers and coders can ensure precise documentation, supporting appropriate diagnosis and treatment. Understanding this connection helps clarify which code to use when encountering patients with this distinctive rash pattern on medical records or insurance billing.
Questions About This Page
How many billable codes are in the L42 range?
Of the 1 codes in this range, 1 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 L42 range classify?
The range classifies pityriasis rosea. 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.
