ICD-10-CM 2027
ICD-10 code for parapsoriasis
From the official ICD-10-CM alphabetic index entry “Parapsoriasis”. Page updated September 29, 2026.
About coding parapsoriasis
The ICD-10-CM code for parapsoriasis is L41.9 (Parapsoriasis, unspecified). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on L41.9.
Within L41, choose L41.9 (unspecified) only when documentation doesn't support a more specific option: pityriasis lichenoides et varioliformis acuta (L41.0), pityriasis lichenoides chronica (L41.1), small plaque parapsoriasis (L41.3), large plaque parapsoriasis (L41.4), Retiform parapsoriasis (L41.5) and other parapsoriasis (L41.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 595 (Major Skin Disorders with MCC, relative weight 2.0239) and DRG 596 (Major Skin Disorders without MCC, relative weight 1.1071), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific parapsoriasis codes (official index)
- en plaques L41.4 — Large plaque parapsoriasis
- guttata L41.1 — Pityriasis lichenoides chronica
- large plaque L41.4 — Large plaque parapsoriasis
- retiform, retiformis L41.5 — Retiform parapsoriasis
- small plaque L41.3 — Small plaque parapsoriasis
- specified NEC L41.8 — Other parapsoriasis
- varioliformis (acuta) L41.0 — Pityriasis lichenoides et varioliformis acuta
Common questions about parapsoriasis ICD-10 codes
What is the ICD-10 code for parapsoriasis?
- L41.9 — Parapsoriasis, unspecified. More specific codes apply when the documentation supports them: L41.4, L41.1, L41.4, L41.5 and others below.
What is the ICD-10 code for en plaques parapsoriasis?
- L41.4 — Large plaque parapsoriasis.
What is the ICD-10 code for guttata parapsoriasis?
- L41.1 — Pityriasis lichenoides chronica.
What is the ICD-10 code for large plaque parapsoriasis?
- L41.4 — Large plaque parapsoriasis.
What is the ICD-10 code for small plaque parapsoriasis?
- L41.3 — Small plaque parapsoriasis.
What is the ICD-10 code for varioliformis parapsoriasis?
- L41.0 — Pityriasis lichenoides et varioliformis acuta.
Is L41.9 billable?
- Yes. L41.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L41.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L41.9 as a principal diagnosis.
Is L41.9 a CC or MCC?
- No. L41.9 is neither a CC nor an MCC under MS-DRG v44.0.