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

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group L43 includes lichen planus and related papulosquamous disorders affecting skin and mucous membranes, including variations by site and presentation. These ICD-10-CM diagnosis codes are used to document inflammatory dermatoses with mucosal involvement, capturing disease severity, distribution, and clinical complexity relevant to this group. Accurate coding within the ICD-10-CM L43 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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ICD-10-CM L43: Lichen Planus Overview

The ICD-10-CM L43 group represents lichen planus and related papulosquamous disorders affecting skin and mucous membranes. These diagnoses describe inflammatory, immune-mediated conditions that commonly involve the integumentary and oral mucosal systems. Accurate coding matters for proper clinical documentation and reimbursement because it captures disease location, severity, and treatment complexity.

When to Use

Use a code from this group when clinical documentation indicates lichen planus or a closely related papulosquamous disorder and includes information on site or variant. Select the most specific code to reflect anatomical location and clinical presentation for accurate documentation and billing.

ICD-10-CM Codes

6 rows

ICD-10-CM Code	Description
L43.0	Hypertrophic lichen planus
L43.1	Bullous lichen planus
L43.2	Lichenoid drug reaction
L43.3	Subacute (active) lichen planus
L43.8	Other lichen planus
L43.9	Lichen planus, unspecified

DRG Codes

2 rows

DRG Code	Description
606	Minor Skin Disorders with MCC
607	Minor Skin Disorders without MCC

Typical Clinical Scenarios

A middle-aged adult presents to dermatology with a several-month history of intensely pruritic, violaceous, flat-topped papules and polygonal plaques on both wrists and ankles, with characteristic Wickham striae on mucosal exam. The lesions are chronic, symmetric, and consistent with classic cutaneous lichen planus without evidence of a drug trigger or secondary infection, so a code for localized cutaneous lichen planus is assigned. Typical codes: L43.0
A patient in primary care reports persistent violaceous papules involving the oral mucosa and diffuse skin involvement with scaling and hair loss; the clinician documents widespread mucocutaneous lichen planus affecting multiple sites and refers for specialty management. Because the presentation involves both oral mucosa and generalized skin disease, a code for lichen planus with mucosal involvement or generalized disease is used. Typical codes: L43.1, L43.3
An older adult on recent new medication develops an acute eruption of lichen planus–like lesions with severe pruritus and ulceration leading to secondary bacterial infection, requiring urgent evaluation and short-course antibiotics. The temporal association with a drug and the presence of lichen planus–like eruption or unspecified lichen planus with complication guides assignment of a drug-related or unspecified lichen planus code depending on documentation. Typical codes: L43.2, L43.9

Related Codes

L40-PSORIASIS

ICD-10-CM Code For Psoriasis: Group Overview

L41-PARAPSORIASIS

ICD-10-CM Code For Parapsoriasis: Group Overview

L42-PITYRIASIS-ROSEA

ICD-10-CM Code For Pityriasis Rosea: 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

6 rows

ICD-10-CM Code	Description
L43.0	Hypertrophic lichen planus
L43.1	Bullous lichen planus
L43.2	Lichenoid drug reaction
L43.3	Subacute (active) lichen planus
L43.8	Other lichen planus
L43.9	Lichen planus, unspecified

DRG Codes

2 rows

DRG Code	Description
606	Minor Skin Disorders with MCC
607	Minor Skin Disorders without MCC

Typical Clinical Scenarios

A middle-aged adult presents to dermatology with a several-month history of intensely pruritic, violaceous, flat-topped papules and polygonal plaques on both wrists and ankles, with characteristic Wickham striae on mucosal exam. The lesions are chronic, symmetric, and consistent with classic cutaneous lichen planus without evidence of a drug trigger or secondary infection, so a code for localized cutaneous lichen planus is assigned. Typical codes: L43.0
A patient in primary care reports persistent violaceous papules involving the oral mucosa and diffuse skin involvement with scaling and hair loss; the clinician documents widespread mucocutaneous lichen planus affecting multiple sites and refers for specialty management. Because the presentation involves both oral mucosa and generalized skin disease, a code for lichen planus with mucosal involvement or generalized disease is used. Typical codes: L43.1, L43.3
An older adult on recent new medication develops an acute eruption of lichen planus–like lesions with severe pruritus and ulceration leading to secondary bacterial infection, requiring urgent evaluation and short-course antibiotics. The temporal association with a drug and the presence of lichen planus–like eruption or unspecified lichen planus with complication guides assignment of a drug-related or unspecified lichen planus code depending on documentation. Typical codes: L43.2, L43.9

Related Codes

L40-PSORIASIS

ICD-10-CM Code For Psoriasis: Group Overview

L41-PARAPSORIASIS

ICD-10-CM Code For Parapsoriasis: Group Overview

L42-PITYRIASIS-ROSEA

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

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

ICD-10-CM L43: Lichen Planus Overview

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

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

ICD-10-CM L43: Lichen Planus Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM L43 group?

What specific ICD-10-CM codes are listed under L43?

Why is accurate coding within the L43 group important for reimbursement?

Which DRGs are related to the L43 diagnosis group?

How does the L43 group capture clinical complexity for documentation?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in the ICD-10-CM L43 group?

What specific ICD-10-CM codes are listed under L43?

Why is accurate coding within the L43 group important for reimbursement?

Which DRGs are related to the L43 diagnosis group?

How does the L43 group capture clinical complexity for documentation?

References