ICD-10-CM Tabular Index · Chapter 12 · FY 2026 L20–L30
Dermatitis and eczema (L20-L30) ICD-10-CM
The L20–L30 section covers dermatitis and eczema with 89 ICD-10-CM diagnosis codes, of which 74 are billable in fiscal year 2026. The section is organized into the 11 code ranges listed below.
✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
11
Code Ranges
89
Diagnosis Codes
74
Billable Codes
L20–L30
Code Range
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the L20–L30 Code Range
ICD-10 codes L20-L30 cover various types of dermatitis and eczema, including atopic, seborrheic, contact, irritant, and other forms of inflammatory skin conditions characterized by itching, redness, and rash.
This range includes atopic dermatitis (L20), commonly known as eczema, with synonyms like Besnier's prurigo and flexural eczema for specific variants. It also covers seborrheic dermatitis (L21), often called cradle cap or dandruff, and the diaper dermatitis (L22) associated with rash in infants. Allergic contact dermatitis (L23) details reactions to metals, adhesives, cosmetics, and other allergens, while irritant contact dermatitis (L24) involves skin irritation from detergents, oils, solvents, and body fluids. Unspecified and other dermatitis types are coded under L25-L30. These codes assist healthcare professionals in accurately documenting skin disorders caused by internal substances, allergies, or irritants, using synonyms like prurigo nodularis, lichen simplex chronicus, and nummular dermatitis to ensure precise classification.
Questions About This Page
How many codes are in the L20-L30 range?
The L20-L30 range contains 89 ICD-10-CM diagnosis codes in FY 2026. 74 of them are billable, and the rest are category headers that organize the section.
What conditions does L20-L30 cover?
The range covers dermatitis and eczema. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Hebra's pityriasis
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
