L40.1 Generalized pustular psoriasis

Billable ICD-10-CM code, FY2026.

Applicable to

• Impetigo herpetiformis
• Von Zumbusch's disease

Risk adjustment (HCC)

• RxHCC V08: HCC 316 — Psoriasis, Except with Arthropathy

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 694.3 Impetigo herpetiformis (approximate)
• 696.1 Other psoriasis (approximate)

Code annotations containing back-references to L40.1

Back-references to L40.1

• Type 1 Excludes: L01 Impetigo ("impetigo herpetiformis (L40.1)")
• Type 1 Excludes: L12 Pemphigoid ("impetigo herpetiformis (L40.1)")

Diagnosis Index entries for L40.1

• Impetigo (any organism) (any site) (circinate) (contagiosa) (simplex) (vulgaris) › herpetiformis
• Impetigo (any organism) (any site) (circinate) (contagiosa) (simplex) (vulgaris) › herpetiformis › nonobstetrical
• Psoriasis › pustular (generalized)
• Von Zumbusch's disease

Nearby codes

• L40 Psoriasis
• L40.0 Psoriasis vulgaris
• L40.1 Generalized pustular psoriasis (this code)
• L40.2 Acrodermatitis continua
• L40.3 Pustulosis palmaris et plantaris
• L40.4 Guttate psoriasis
• L40.5 Arthropathic psoriasis
• L40.50 Arthropathic psoriasis, unspecified