Is L03 a billable ICD-10-CM code?

No. L03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does L03 sit in the tabular list?

Diseases of the skin and subcutaneous tissue (L00-L99), in the block Infections of the skin and subcutaneous tissue (L00-L08).

L03

L03 — Cellulitis and acute lymphangitis

Non-billable headerICD-10-CM

L03 is a non-billable header ICD-10-CM code for cellulitis and acute lymphangitis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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)

Other codes that can never be billed with L03

These codes carry an Excludes1 note pointing at L03. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading L03 alone.

I89.1Lymphangitis

Risk adjustment

L03 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead L03

6 child codes. Green means billable.

Questions about L03

Is L03 a billable ICD-10-CM code?: No. L03 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does L03 sit in the tabular list?: Diseases of the skin and subcutaneous tissue (L00-L99), in the block Infections of the skin and subcutaneous tissue (L00-L08).