L03.0 – Cellulitis and acute lymphangitis of finger and toe

ICD-10-CM 2027 diagnosis code · Infections of the skin and subcutaneous tissue

Non-billable header

ICD-10-CM code L03.0

Code: L03.0 (claims format: L030)
Description: Cellulitis and acute lymphangitis of finger and toe
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 12. Diseases of the skin and subcutaneous tissue (L00-L99)
Block: L00-L08 Infections of the skin and subcutaneous tissue
Parent codes: L03

Billable codes under L03.0

L03.0 is a header code and cannot be used on claims. Choose the most specific code:

L03.01 – Cellulitis of fingerHeader (more codes below)
L03.02 – Acute lymphangitis of fingerHeader (more codes below)
L03.03 – Cellulitis of toeHeader (more codes below)
L03.04 – Acute lymphangitis of toeHeader (more codes below)

Notes for L03.0

Applicable to:

Infection of nail
Onychia
Paronychia
Perionychia

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

L03 – Cellulitis and acute lymphangitis

Excludes2 (not included here):

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)

Block L00-L08

Excludes2 (not included here):

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 (B95-B97) to identify infectious agent.

Related codes in L03

Frequently asked questions

What is ICD-10 code L03.0?

L03.0 is the ICD-10-CM code for cellulitis and acute lymphangitis of finger and toe, in the block L00-L08 (Infections of the skin and subcutaneous tissue).

Is L03.0 a billable code?

No. L03.0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does L03.0 belong to?

It belongs to category L03 – Cellulitis and acute lymphangitis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.