2026 ICD-10-CM Diagnosis Code L20.83Infantile (acute) (chronic) eczema

ICD-10-CM Codes›L00–L99›L20-L30›L20

ICD-10-CM L20.83
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L20.83 is a billable ICD-10-CM diagnosis code for infantile (acute) (chronic) eczema. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. The code is restricted by the Medicare Code Editor to pediatric patients (age 0 through 17). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L20.83
Billable Status
Yes — Valid for Submission
Code Describes
Infantile (acute) (chronic) eczema
Short Description
Infantile (acute) (chronic) eczema
Same as the full description in the CMS dataset.
Parent Code
L20.8
Other atopic dermatitis

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL20-L30Dermatitis and eczema
CategoryL20Atopic dermatitis
This CodeL20.83Infantile (acute) (chronic) eczema

Code EditsBilling

Medicare Code Editor checks that affect claim validity for L20.83.

Pediatric diagnoses
The Medicare Code Editor detects inconsistencies in pediatric cases by checking a patient's age and any diagnosis on the patient's record. The pediatric code edits apply to patients age range is 0–17 years inclusive (e.g., Reye's syndrome, routine child health exam).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute eczema
  • Acute hand eczema
  • Acute infantile eczema
  • Chronic eczema of foot
  • Chronic hand eczema
  • Chronic infantile eczema
  • Dermatitis of anogenital region
  • Eczema
  • Eczema of finger
  • Eczema of lower leg
  • Eczema of lower limb
  • Eczema of male genitalia
  • Eczema of scalp
  • Eczema of wrist
  • Exacerbation of eczema
  • Facial eczema
  • Fingertip eczema
  • Firm nonpitting edema
  • Foot eczema
  • Generalized eczema
  • Hand eczema
  • Infantile atopic dermatitis
  • Infantile eczema
  • Nonallergic eczema
  • Non-pitting edema

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.

    • Eczema(acute) (chronic) (erythematous) (fissum) (rubrum) (squamous)
      • infantile (due to any substance)

Clinical ClassificationClinical

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

CCSR INJ031
Allergic reactions
Default principal diagnosis: inpatient No · outpatient No
CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Dermatitis, Allergic Contact

    a contact dermatitis due to allergic sensitization to various substances. these substances subsequently produce inflammatory reactions in the skin of those who have acquired hypersensitivity to them as a result of prior exposure.

  • Dermatitis, Atopic

    a chronic inflammatory genetically determined disease of the skin marked by increased ability to form reagin (ige), with increased susceptibility to allergic rhinitis and asthma, and hereditary disposition to a lowered threshold for pruritus. it is manifested by lichenification, excoriation, and crusting, mainly on the flexural surfaces of the elbow and knee. in infants it is known as infantile eczema.

  • Dermatitis, Contact

    a type of acute or chronic skin reaction in which sensitivity is manifested by reactivity to materials or substances coming in contact with the skin. it may involve allergic or non-allergic mechanisms.

  • Eczema

    a dermatitis characterized by a spongiotic tissue reaction pattern occurring as a reaction to many endogenous and exogenous agents.

  • Eczema, Dyshidrotic

    a recurrent eczematous reaction characterized by the development of vesicular eruptions on the palms and soles, particularly along the sides and between the digits. it is accompanied by pruritus, a burning sensation, and hyperhidrosis. the disease is self-limiting, lasting only a few weeks. (dorland, 27th ed)

  • Kaposi Varicelliform Eruption

    a disseminated vesicular-pustular eruption caused by the herpes simplex virus (herpesvirus hominis), the vaccinia virus, or varicella zoster (herpesvirus 3, human). it is usually superimposed on a preexisting, inactive or active, atopic dermatitis (dermatitis, atopic).

  • Skin Diseases, Eczematous

    any of a variety of eruptive skin disorders characterized by erythema, oozing, vesiculation, and scaling. etiology is varied.

  • Wiskott-Aldrich Syndrome

    a rare, x-linked immunodeficiency syndrome characterized by eczema; lymphopenia; and, recurrent pyogenic infection. it is seen exclusively in young boys. typically, immunoglobulin m levels are low and immunoglobulin a and immunoglobulin e levels are elevated. lymphoreticular malignancies are common.

Patient EducationClinical

Eczema

Eczema is a term for several different types of skin swelling. Eczema is also called dermatitis. Most types cause dry, itchy skin and rashes on the face, inside the elbows and behind the knees, and on the hands and feet. Scratching the skin can cause it to turn red, and to swell and itch even more.

Read the full article at MedlinePlus

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

Convert L20.83 to ICD-9-CMHistory

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

ICD-9-CM
690.12 Sbrheic infantl drmtitis
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 L20.83Overview

Is L20.83 (Other atopic dermatitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infantile (acute) (chronic) eczema on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does L20.83 group to?

When infantile (acute) (chronic) eczema is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can L20.83 be reported for?

The Medicare Code Editor checks infantile (acute) (chronic) eczema against patient demographics: this code is intended for pediatric patients (age 0 through 17). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of L20.83?

Under the General Equivalence Mappings, infantile (acute) (chronic) eczema converts to ICD-9-CM 690.12 (sbrheic infantl drmtitis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.