2026 ICD-10-CM Diagnosis Code L40.8Other psoriasis

ICD-10-CM Codes›L00–L99›L40-L45›L40

ICD-10-CM L40.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L40.8 is a billable ICD-10-CM diagnosis code for other psoriasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 595 through 596. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L40.8
Billable Status
Yes — Valid for Submission
Code Describes
Other psoriasis
Short Description
Other psoriasis
Same as the full description in the CMS dataset.
Parent Code
L40
Psoriasis

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL40-L45Papulosquamous disorders
CategoryL40Psoriasis
This CodeL40.8Other psoriasis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute pustular skin eruption
  • Eczematized psoriasis
  • Erythrodermic psoriasis
  • Familial psoriasis
  • Familial psoriasis with affected first degree relative
  • Familial psoriasis without affected first degree relative
  • Flexural psoriasis
  • Follicular psoriasis
  • Generalized pustular psoriasis
  • Hypertrophic palmar psoriasis
  • Hypertrophic palmoplantar psoriasis
  • Inflammatory epidermal nevus
  • Juvenile pustular psoriasis
  • Köbner psoriasis
  • Lapiere type of psoriasis
  • Nevoid psoriasis
  • Photoaggravated psoriasis
  • Photoaggravation of disorder
  • Psoriasiform dermatitis
  • Psoriasis annularis
  • Psoriasis circinata
  • Psoriasis diffusa
  • Psoriasis geographica
  • Psoriasis gyrata
  • Psoriasis inveterata
  • Psoriasis of anogenital region
  • Psoriasis of perianal skin
  • Psoriasis punctata
  • Psoriasis universalis
  • Psoriasis with eczema
  • Rupioid psoriasis
  • Seborrheic psoriasis
  • Spongiotic dermatitis
  • Spongiotic psoriasiform dermatitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Flexural psoriasis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Erythroderma(secondary)
      • psoriaticum
    • Psoriasis
      • flexural
    • Psoriasis
      • specified NEC

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Arthritis, Psoriatic

    a type of inflammatory arthritis associated with psoriasis, often involving the axial joints and the peripheral terminal interphalangeal joints. it is characterized by the presence of hla-b27-associated spondylarthropathy, and the absence of rheumatoid factor.

  • Guttate Psoriasis

    a skin condition, typically emerges suddenly and frequently occurs after an infection such as streptococcal infection. while prevalent among children, it can also manifest in young adults. its defining feature is the eruption of small, red, scaly patches that typically appear on the arms, legs, and torso.

  • 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.

  • Streptococcal Infections

    infections with bacteria of the genus streptococcus.

  • Spongiotic Dermatitis

    a chronic inflammatory skin condition characterized by itchiness and a rash in the chest and abdominal areas. it affects males more than females and is usually contracted at a relatively young age. it is thought to be caused by an allergic reaction to food, insect bites, or medication.

  • Psoriasiform Dermatitis

    a chronic, sporadic, acquired pruritic non-infectious skin condition characterized by one or more well defined inflamed (pink or red) patches or plaques of varying size.

  • Generalized Pustular Psoriasis

    a genetically heterogenous autoinflammatory condition characterized by sterile non-follicular pustules over wide areas of the body. it is a rare and severe form of psoriasis, and may result in death if not treated.

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.

Convert L40.8 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
696.1 Other psoriasis
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L40.8Overview

Is L40.8 (Psoriasis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other psoriasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L40.8 group to?

When other psoriasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 595, 596, with relative weights from 1.0825 to 2.1207 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L40.8?

Under the General Equivalence Mappings, other psoriasis converts to ICD-9-CM 696.1 (other psoriasis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.