U.S. ICD-10-CM · FY 2027

L03 ICD-10-CM Code: Cellulitis and acute lymphangitis

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

L03

Cellulitis and acute lymphangitis

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where L03 sits

  1. 1

    Chapter 12

    Diseases of the skin and subcutaneous tissue (L00-L99)

  2. 2

    Section

    Infections of the skin and subcutaneous tissue (L00-L08)

  3. 3

    Category L03

    Cellulitis and acute lymphangitis

  4. 4

    Code L03

    Cellulitis and acute lymphangitis

More specific choices

Codes under L03

L03 is a non-billable category. Choose the child code that best matches the documented diagnosis.

L03.0

Cellulitis and acute lymphangitis of finger and toe

L03.1

Cellulitis and acute lymphangitis of other parts of limb

L03.2

Cellulitis and acute lymphangitis of face and neck

L03.3

Cellulitis and acute lymphangitis of trunk

L03.8

Cellulitis and acute lymphangitis of other sites

L03.9

Cellulitis and acute lymphangitis, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for L03.

Code first

No “code first” instruction is listed for L03.

Use additional code

No “use additional code” instruction is listed for L03.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for L03.

Excludes2

Conditions not included here that may be reported separately when present.

  • cellulitis of anal and rectal region (K61.-)
  • cellulitis of external auditory canal (H60.1)
  • cellulitis of eyelid (H00.0)
  • cellulitis of female external genital organs (N76.4)
  • cellulitis of lacrimal apparatus (H04.3)
  • cellulitis of male external genital organs (N48.2, N49.-)
  • cellulitis of mouth (K12.2)
  • cellulitis of nose (J34.0)
  • eosinophilic cellulitis [Wells] (L98.3)
  • febrile neutrophilic dermatosis [Sweet] (L98.2)
  • lymphangitis (chronic) (subacute) (I89.1)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code L03 mean?

L03 is the FY 2027 U.S. ICD-10-CM code for “Cellulitis and acute lymphangitis.”

Is L03 a billable or specific ICD-10-CM code?

No. L03 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is L03 located in ICD-10-CM?

L03 is listed in Chapter 12, Diseases of the skin and subcutaneous tissue (L00-L99), within Infections of the skin and subcutaneous tissue (L00-L08) (L00–L08), under category L03, Cellulitis and acute lymphangitis.

What coding notes are listed for L03?

No inclusion terms are listed for L03 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: cellulitis of anal and rectal region (K61.-); cellulitis of external auditory canal (H60.1); cellulitis of eyelid (H00.0); cellulitis of female external genital organs (N76.4); cellulitis of lacrimal apparatus (H04.3); cellulitis of male external genital organs (N48.2, N49.-); cellulitis of mouth (K12.2); cellulitis of nose (J34.0); eosinophilic cellulitis [Wells] (L98.3); febrile neutrophilic dermatosis [Sweet] (L98.2); lymphangitis (chronic) (subacute) (I89.1).

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