L03.91 – Acute lymphangitis, unspecified

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

Billable code

ICD-10-CM code L03.91
Code
L03.91 (claims format: L0391)
Description
Acute lymphangitis, unspecified
Billable
Yes – valid for HIPAA-covered transactions
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 › L03.9

Notes for L03.91

Excludes1 (not coded here):

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.

Index terms for L03.91

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in L03.9

Frequently asked questions

What is ICD-10 code L03.91?

L03.91 is the ICD-10-CM code for acute lymphangitis, unspecified, in the block L00-L08 (Infections of the skin and subcutaneous tissue).

Is L03.91 a billable code?

Yes. L03.91 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does L03.91 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.