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L40.1

✓ Billable

Generalized pustular psoriasis

Diseases of the skin and subcutaneous tissue (L00-L99)

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Also Known As

Impetigo herpetiformisVon Zumbusch's disease
✓ No additional coding notes for L40.1

Clinical Description

ICD-10-CM code L40.1 represents generalized pustular psoriasis. This code falls under the Diseases of the skin and subcutaneous tissue (L00-L99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory.

Frequently Asked Questions

What is ICD-10 code L40.1?

ICD-10-CM code L40.1 is "Generalized pustular psoriasis". It belongs to the category: Diseases of the skin and subcutaneous tissue (L00-L99).

Is L40.1 a billable ICD-10 code?

Yes, L40.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Related Codes in L40

Other codes in the same category that may be relevant for differential coding:

L40.0Psoriasis vulgarisL40.2Acrodermatitis continuaL40.3Pustulosis palmaris et plantarisL40.4Guttate psoriasisL40.5Arthropathic psoriasisL40.8Other psoriasisL40.9Psoriasis, unspecified

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Code Information

CodeL40.1
BillableYes
ParentL40
CategoryDiseases of the skin and subcutaneous tissue (L00-L99)
Excludes10 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)