ICD-10 L40.1
Billable / SpecificGeneralized pustular psoriasis
About ICD-10-CM L40.1
ICD-10-CM code L40.1 represents Generalized pustular psoriasis. This is a billable/specific code in the Skin and Subcutaneous Tissue chapter (block L40). The 2026 edition of ICD-10-CM L40.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under L40.1. Per CMS ICD-10-CM Tabular 2026.
- Impetigo herpetiformis
- Von Zumbusch's disease
Medicare LCD Coverage for L40.1
Local Coverage Determinations (LCDs) from CMS MACs that list L40.1 as a covered diagnosis.
Showing top 10 of 52 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing L40.1.
5 Medicare
1 Aetna
CPT Codes Commonly Billed with L40.1
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 96910 Phototherapy UVB — psoriasis, guttate psoriasis, psoriasis unspecified, atopic dermatitis, prurigo, dermatitis, lichen planus Dermatology
- 11732 CMS LCD: Billing and Coding: Surgical Treatment of Nails CMS LCD
- 11765 CMS LCD: Billing and Coding: Surgical Treatment of Nails CMS LCD
- 11750 CMS LCD: Billing and Coding: Surgical Treatment of Nails CMS LCD
Convert L40.1 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| L40.1 | 6943 | 10000 |
| L40.1 | 6961 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To L40.1
Other codes in section L40-L45 (Papulosquamous disorders).
ICD-10 L40.1, Billing FAQ
Is ICD-10 code L40.1 billable? +
Yes, L40.1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to L40.1? +
ICD-10 L40.1 includes: Impetigo herpetiformis; Von Zumbusch's disease.
What CPT codes are commonly billed with L40.1? +
Procedures frequently paired with L40.1 include: 96910, 11732, 11765, 11750.
What ICD-9 codes does L40.1 map to? +
Per CMS GEMs, L40.1 maps to ICD-9 codes: 6943, 6961. Useful for legacy data review and historical claim analysis.
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team