ICD-10-CM Code For Parapsoriasis: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group L41 includes parapsoriasis variants, such as small-plaque and large-plaque parapsoriasis, and related chronic scaly skin disorders that may mimic other papulosquamous diseases. These ICD-10-CM diagnosis codes are used to document the presence and clinical characteristics of chronic scaly patches or plaques, capturing disease distribution, chronicity, and diagnostic specificity relevant to dermatologic management. Accurate coding within the ICD-10-CM L41 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM L41: Parapsoriasis Overview

Parapsoriasis describes a group of chronic papulosquamous skin disorders characterized by scaly patches or plaques, often affecting the trunk and proximal limbs. These conditions target the integumentary system and can range from small-plaque variants to larger, more persistent lesions. Accurate coding ensures complete clinical documentation and supports appropriate reimbursement for dermatologic care.

When to Use

Use a code from this group when a clinician documents parapsoriasis or a specified subtype with sufficient clinical detail about lesion morphology and distribution. Codes are applied for encounters involving diagnosis, monitoring, or treatment of chronic scaly patches or plaques attributed to parapsoriasis.

ICD-10-CM Codes

7 rows

ICD-10-CM Code	Description
L41.0	Pityriasis lichenoides et varioliformis acuta
L41.1	Pityriasis lichenoides chronica
L41.3	Small plaque parapsoriasis
L41.4	Large plaque parapsoriasis
L41.5	Retiform parapsoriasis
L41.8	Other parapsoriasis
L41.9	Parapsoriasis, unspecified

DRG Codes

2 rows

DRG Code	Description
595	Major Skin Disorders with MCC
596	Major Skin Disorders without MCC

Typical Clinical Scenarios

A middle-aged patient presents to dermatology with slowly progressive, scaly, erythematous patches that have been stable for months and primarily affect the trunk and proximal limbs; history and exam suggest chronic, persistent parapsoriasis (small-plaque or large-plaque) rather than eczema or psoriasis, so a parapsoriasis-specific diagnosis is assigned after clinic evaluation and skin biopsy may be planned. Typical codes: L41.0, L41.1
An elderly patient with long-standing, widespread, poikilodermatous patches and focal atrophy is seen for worsening photosensitivity and new ulceration; because the presentation is of chronic, extensive parapsoriasis with atypical features raising concern for progression toward cutaneous lymphoma, a parapsoriasis diagnosis code indicating the chronic large-plaque variant is used while further workup is arranged. Typical codes: L41.3, L41.4
A patient with a prior diagnosis of parapsoriasis presents to urgent care with a superimposed bacterial skin infection (secondary impetiginization) at the site of long-standing scaly plaques causing increasing pain, erythema, and purulence; the clinician documents parapsoriasis as the underlying dermatologic condition contributing to the infection and assigns the appropriate parapsoriasis code alongside the acute infection code. Typical codes: L41.5, L41.9

Related Codes

L40-PSORIASIS

ICD-10-CM Code For Psoriasis: Group Overview

L42-PITYRIASIS-ROSEA

ICD-10-CM Code For Pityriasis Rosea: Group Overview

L43-LICHEN-PLANUS

ICD-10-CM Code For Lichen Planus: Group Overview

L44-OTHER-PAPULOSQUAMOUS-DISORDERS

ICD-10-CM Code For Other Papulosquamous Disorders: Group Overview

L45-PAPULOSQUAMOUS-DISORDERS-IN-DISEASES-CLASSIFIED-ELSEWHERE

ICD-10-CM Code For Papulosquamous Disorders In Diseases Classified Elsewhere: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

7 rows

ICD-10-CM Code	Description
L41.0	Pityriasis lichenoides et varioliformis acuta
L41.1	Pityriasis lichenoides chronica
L41.3	Small plaque parapsoriasis
L41.4	Large plaque parapsoriasis
L41.5	Retiform parapsoriasis
L41.8	Other parapsoriasis
L41.9	Parapsoriasis, unspecified

DRG Codes

2 rows

DRG Code	Description
595	Major Skin Disorders with MCC
596	Major Skin Disorders without MCC

Typical Clinical Scenarios

A middle-aged patient presents to dermatology with slowly progressive, scaly, erythematous patches that have been stable for months and primarily affect the trunk and proximal limbs; history and exam suggest chronic, persistent parapsoriasis (small-plaque or large-plaque) rather than eczema or psoriasis, so a parapsoriasis-specific diagnosis is assigned after clinic evaluation and skin biopsy may be planned. Typical codes: L41.0, L41.1
An elderly patient with long-standing, widespread, poikilodermatous patches and focal atrophy is seen for worsening photosensitivity and new ulceration; because the presentation is of chronic, extensive parapsoriasis with atypical features raising concern for progression toward cutaneous lymphoma, a parapsoriasis diagnosis code indicating the chronic large-plaque variant is used while further workup is arranged. Typical codes: L41.3, L41.4
A patient with a prior diagnosis of parapsoriasis presents to urgent care with a superimposed bacterial skin infection (secondary impetiginization) at the site of long-standing scaly plaques causing increasing pain, erythema, and purulence; the clinician documents parapsoriasis as the underlying dermatologic condition contributing to the infection and assigns the appropriate parapsoriasis code alongside the acute infection code. Typical codes: L41.5, L41.9

Related Codes

L40-PSORIASIS

ICD-10-CM Code For Psoriasis: Group Overview

L42-PITYRIASIS-ROSEA

ICD-10-CM Code For Pityriasis Rosea: Group Overview

L43-LICHEN-PLANUS

ICD-10-CM Code For Lichen Planus: Group Overview

L44-OTHER-PAPULOSQUAMOUS-DISORDERS

ICD-10-CM Code For Other Papulosquamous Disorders: Group Overview

L45-PAPULOSQUAMOUS-DISORDERS-IN-DISEASES-CLASSIFIED-ELSEWHERE

ICD-10-CM Code For Papulosquamous Disorders In Diseases Classified Elsewhere: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Parapsoriasis: Group Overview

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ICD-10-CM L41: Parapsoriasis Overview

ICD-10-CM Code For Parapsoriasis: Group Overview

Sign up for ICD-10-CM Code For Parapsoriasis: Group Overview policy alerts

ICD-10-CM L41: Parapsoriasis Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes are included in the L41 parapsoriasis group?

What clinical features are captured by ICD-10-CM codes in L41?

How does accurate coding within L41 support billing and reimbursement?

Which DRGs are related to parapsoriasis coding in L41?

When should a coder choose an unspecified L41 code versus a specific one?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-CM codes are included in the L41 parapsoriasis group?

What clinical features are captured by ICD-10-CM codes in L41?

How does accurate coding within L41 support billing and reimbursement?

Which DRGs are related to parapsoriasis coding in L41?

When should a coder choose an unspecified L41 code versus a specific one?

References