Skip to main content

K13.0 vs L01.0

K13.0 (Diseases of lips) compared with L01.0 (Impetigo), from the official CMS tabular data.

Summary

These codes can be reported together when both conditions are documented, because L01.0 lists K13.0 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named, billing status and chapter.K13.0 is “Diseases of lips”; L01.0 is “Impetigo”. L01.0 is a non-billable header; K13.0 is billable. K13.0 sits in K00-K95 — Diseases of the Digestive System (K00-K95); L01.0 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.L01.0 lists K13.0 under Excludes2: “Perlèche NOS (K13.0)”. 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. K13.0 carries 6 Excludes1 notes and L01.0 carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

Yes.L01.0’s tabular entry: “Perlèche NOS (K13.0)”. The note covers K13.0.

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?

One is a header.L01.0 is a non-billable header, but K13.0 is not one of its subdivisions.

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

L01.0
Impetigo
↔
K13.0
Diseases of lips

What we found

Yes, when both are documented.L01.0 carries an Excludes2 note covering K13.0: “Perlèche NOS (K13.0)”

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

K13.0Diseases of lipsL01.0Impetigo
Billing statusBillableNon-billable header

Report instead: L01.00, L01.01, L01.02, L01.03, L01.09

ClassificationK00-K95 — Diseases of the Digestive System (K00-K95)L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99)
DefinitionDiseases of lips is a billable ICD-10-CM diagnosis code (K13.0).Impetigo is a non-billable ICD-10-CM category code (L01.0).
Includes
epithelial disturbances of tongue
Abscess of lips
Angular cheilitis
Cellulitis of lips
Impetigo contagiosa
Impetigo vulgaris
Excludes1
ariboflavinosis (E53.0)
cheilitis due to radiation-related disorders (L55-L59)
congenital fistula of lips (Q38.0)
congenital hypertrophy of lips (Q18.6)
Perlèche due to candidiasis (B37.83)
Perlèche due to riboflavin deficiency (E53.0)
impetigo herpetiformis (L40.1)
Excludes2
certain disorders of gingiva and edentulous alveolar ridge (K05-K06)
cysts of oral region (K09.-)
diseases of tongue (K14.-)
stomatitis and related lesions (K12.-)
hordeolum (H00.0)
infective dermatitis (L30.3)
local infections of skin classified in Chapter 1
lupus panniculitis (L93.2)
panniculitis NOS (M79.3)
panniculitis of neck and back (M54.0-)
Perlèche NOS (K13.0)
Perlèche due to candidiasis (B37.0)
Perlèche due to riboflavin deficiency (E53.0)
pyogenic granuloma (L98.0)
relapsing panniculitis [Weber-Christian] (M35.6)
viral warts (B07.-)
zoster (B02.-)
Use additional code
code to identify:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
code (B95-B97) to identify infectious agent.

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