MCMedicalCodingSoftware
L03.91

L03.91: Acute lymphangitis, unspecified

Billable / specific codeICD-10-CM

L03.91 is a billable, specific ICD-10-CM code for acute lymphangitis, unspecified. It is valid for submission on a claim.

Check L03.91 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Excludes2 inherited from the categories above L03.91

Not part of this code, but both may be coded when both are present.

Written on L03: Cellulitis and acute lymphangitis

  • 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 L03.91

Their own Excludes1 notes name this code, so the conflict is not listed above.

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

L03.91 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52996Billing and Coding: Routine Foot Care
  • A57954Billing and Coding: Routine Foot Care

Alphabetic index entries that lead here

  • Lymphangitis›acute

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under L03.9

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.