L40 – Psoriasis
ICD-10-CM 2027 diagnosis code · Papulosquamous disorders
ICD-10-CM code
L40
- Code
L40(claims format:L40)- Description
- Psoriasis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 12. Diseases of the skin and subcutaneous tissue (L00-L99)
- Block
- L40-L45 Papulosquamous disorders
Billable codes under L40
L40 is a header code and cannot be used on claims. Choose the most specific code:
- L40.0 – Psoriasis vulgarisBillable
- L40.1 – Generalized pustular psoriasisBillable
- L40.2 – Acrodermatitis continuaBillable
- L40.3 – Pustulosis palmaris et plantarisBillable
- L40.4 – Guttate psoriasisBillable
- L40.5 – Arthropathic psoriasisHeader (more codes below)
- L40.8 – Other psoriasisBillable
- L40.9 – Psoriasis, unspecifiedBillable
Frequently asked questions
What is ICD-10 code L40?
L40 is the ICD-10-CM code for psoriasis, in the block L40-L45 (Papulosquamous disorders).
Is L40 a billable code?
No. L40 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.