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D71 vs L20-L30

D71 (Functional disorders of polymorphonuclear neutrophils) compared with L20-L30 (Dermatitis and eczema (L20-L30)), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because L20-L30 lists D71 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and chapter.D71 is “Functional disorders of polymorphonuclear neutrophils”; L20-L30 is “Dermatitis and eczema (L20-L30)”. D71 sits in D50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89); L20-L30 in L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99).

Registry fact

Can these codes be reported together?

Yes, when both are documented.L20-L30 lists D71 under Excludes2: “chronic (childhood) granulomatous disease (D71-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code.

Official rule

Is there an Excludes2 relationship?

Yes.L20-L30’s tabular entry: “chronic (childhood) granulomatous disease (D71-)”. The note covers D71.

Official ruleGuide: Excludes1 vs Excludes2

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

Both are headers.Both are non-billable headers, and neither contains the other.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

L20-L30
Dermatitis and eczema (L20-L30)
↔
D71
Functional disorders of polymorphonuclear neutrophils

What we found

Yes, when both are documented.L20-L30 carries an Excludes2 note covering D71: “chronic (childhood) granulomatous disease (D71-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    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.

    ICD-10-CM Official Guidelines FY2026

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

D71Functional disorders of polymorphonuclear neutrophilsL20-L30Dermatitis and eczema (L20-L30)
Billing statusNon-billable header

Report instead: D71.1, D71.8, D71.9

Non-billable header
ClassificationD50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89)L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
DefinitionFunctional disorders of polymorphonuclear neutrophils is a non-billable ICD-10-CM category code (D71).Dermatitis and eczema (L20-L30) is a non-billable ICD-10-CM category code (L20-L30).
Excludes2—
chronic (childhood) granulomatous disease (D71-)
dermatitis gangrenosa (L08.0)
dermatitis herpetiformis (L13.0)
dry skin dermatitis (L85.3)
factitial dermatitis (L98.1)
perioral dermatitis (L71.0)
radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
stasis dermatitis (I87.2)

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources