ICD-10 Code for Psoriasis
The ICD-10-CM code for psoriasis is L40.9 — Psoriasis, unspecified. This is the code the Alphabetic Index gives for psoriasis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
L40.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which psoriasis code should you use?
The Alphabetic Index lists 14 codes under Psoriasis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| arthropathic | L40.50 | Arthropathic psoriasis, unspecified | |
| buccal | K13.29 | Other disturbances of oral epithelium, including tongue | |
| flexural | L40.8 | Other psoriasis | |
| guttate | L40.4 | Guttate psoriasis | |
| mouth | K13.29 | Other disturbances of oral epithelium, including tongue | |
| nummular | L40.0 | Psoriasis vulgaris | |
| plaque | L40.0 | Psoriasis vulgaris | |
| psychogenic | F54 | Psychological and behavioral factors associated with disorders or diseases classified elsewhere | |
| pustular | L40.1 | Generalized pustular psoriasis | |
| specified NEC | L40.8 | Other psoriasis | |
| vulgaris | L40.0 | Psoriasis vulgaris |
Psoriasis arthropathic
Psoriasis pustular
| palmaris et plantaris | L40.3 | Pustulosis palmaris et plantaris |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources