2027 ICD-10-CM Diagnosis Code L40.2Acrodermatitis continua

ICD-10-CM Codes›L00–L99›L40-L45›L40

ICD-10-CM L40.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L40.2 is a billable ICD-10-CM diagnosis code for acrodermatitis continua. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 595 through 596. Coders also document this condition as acrodermatitis continua of Hallopeau. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

L40.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 316 for payment year 2027.

Code Identity

ICD-10-CM Code
L40.2
Billable Status
Yes — Valid for Submission
Code Describes
Acrodermatitis continua
Short Description
Acrodermatitis continua
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 CodeL40.2Acrodermatitis continua

Medicare Risk Adjustment (HCC)Billing

L40.2 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 316 — Psoriasis, Except with Arthropathy
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acrodermatitis continua of Hallopeau
  • Localized pustular psoriasis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L40.2: 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.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

  • 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.

Convert L40.2 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L40.2Overview

What is the ICD-10 code for acrodermatitis continua?

The ICD-10-CM code for acrodermatitis continua is L40.2 (sometimes written as L402). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L40.2 (Psoriasis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acrodermatitis continua on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L40.2 group to?

When acrodermatitis continua is the principal diagnosis on an inpatient stay, it groups to MS-DRG 596, 595, with relative weights from 1.1067 to 2.0230 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L40.2?

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

Does L40.2 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: L40.2 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 316 (Psoriasis, Except with Arthropathy).