U.S. ICD-10-CM · FY 2027

L40.1 ICD-10-CM Code: Generalized pustular psoriasis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

L40.1

Generalized pustular psoriasis

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where L40.1 sits

  1. 1

    Chapter 12

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

  2. 2

    Section

    Papulosquamous disorders (L40-L45)

  3. 3

    Category L40

    Psoriasis

  4. 4

    Code L40.1

    Generalized pustular psoriasis

Documentation details

Notes for this code

Inclusion terms

  • Impetigo herpetiformis
  • Von Zumbusch's disease

Code first

No “code first” instruction is listed for L40.1.

Use additional code

No “use additional code” instruction is listed for L40.1.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for L40.1.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for L40.1.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code L40.1 mean?

L40.1 is the FY 2027 U.S. ICD-10-CM code for “Generalized pustular psoriasis.”

Is L40.1 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, L40.1 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is L40.1 located in ICD-10-CM?

L40.1 is listed in Chapter 12, Diseases of the skin and subcutaneous tissue (L00-L99), within Papulosquamous disorders (L40-L45) (L40–L45), under category L40, Psoriasis.

What coding notes are listed for L40.1?

Its listed inclusion terms are Impetigo herpetiformis; Von Zumbusch's disease. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

Keep exploring

Related L40 codes

L40.0

Psoriasis vulgaris

L40.2

Acrodermatitis continua

L40.3

Pustulosis palmaris et plantaris

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