2027 ICD-10-CM Diagnosis Code L40Psoriasis

ICD-10-CM Codes›L00–L99›L40-L45›L40

ICD-10-CM L40
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L40 is a non-billable ICD-10-CM category code for psoriasis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L40.0, L40.1, L40.2, and L40.3.

Code Identity

ICD-10-CM Code
L40
Billable Status
No — Non-Billable Category
Code Describes
Psoriasis
Short Description
Psoriasis
Same as the full description in the CMS dataset.
Chapter
L40-L45
Papulosquamous disorders

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL40-L45Papulosquamous disorders
CategoryL40Psoriasis
This CodeL40Psoriasis

Specific Coding for PsoriasisOverview

Non-specific codes like L40 require more characters. Use one of these billable codes instead:

  • Use L40.0 for Psoriasis vulgaris

  • Use L40.1 for Generalized pustular psoriasis

  • Use L40.2 for Acrodermatitis continua

  • Use L40.3 for Pustulosis palmaris et plantaris

  • Use L40.4 for Guttate psoriasis

  • L40.5 for Arthropathic psoriasis

  • Use L40.50 for Arthropathic psoriasis, unspecified

  • Use L40.51 for Distal interphalangeal psoriatic arthropathy

  • Use L40.52 for Psoriatic arthritis mutilans

  • Use L40.53 for Psoriatic spondylitis

  • Use L40.54 for Psoriatic juvenile arthropathy

  • Use L40.59 for Other psoriatic arthropathy

  • Use L40.8 for Other psoriasis

  • Use L40.9 for Psoriasis, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L40: its own notes plus those printed at Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical InformationClinical

  • Psoriasis

    a common genetically determined, chronic, inflammatory skin disease characterized by rounded erythematous, dry, scaling patches. the lesions have a predilection for nails, scalp, genitalia, extensor surfaces, and the lumbosacral region. accelerated epidermopoiesis is considered to be the fundamental pathologic feature in psoriasis.

Patient EducationClinical

Psoriasis

Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales. You usually get the patches on your elbows, knees, scalp, back, face, palms and feet, but they can show up on other parts of your body. Some people who have psoriasis also get a form of arthritis called psoriatic arthritis.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L40Overview

What is the ICD-10 code for psoriasis?

L40 is the ICD-10-CM category for psoriasis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is L40 (Psoriasis) a billable code?

No. This is a category header that groups the codes for psoriasis, and headers cannot be submitted on claims. Claims for psoriasis need a more specific code from this category, such as L40.0, L40.1, and L40.2.