---
title: "ICD-10-CM L03.91: Acute lymphangitis, unspecified | BillingBrief"
description: "ICD-10-CM code L03.91: Acute lymphangitis, unspecified. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/l03.91/"
language: "en"
---

# L03.91 Acute lymphangitis, unspecified

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Acute lymphangitis, unspecified

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   lymphangitis NOS (I89.1)

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   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)
-   hordeolum (H00.0)
-   infective dermatitis ([L30.3](https://billingbrief.com/icd10/l30.3/))
-   local infections of skin classified in Chapter 1
-   lupus panniculitis (L93.2)
-   panniculitis NOS ([M79.3](https://billingbrief.com/icd10/m79.3/))
-   panniculitis of neck and back (M54.0-)
-   Perlèche NOS (K13.0)
-   Perlèche due to candidiasis ([B37.0](https://billingbrief.com/icd10/b37.0/))
-   Perlèche due to riboflavin deficiency ([E53.0](https://billingbrief.com/icd10/e53.0/))
-   pyogenic granuloma (L98.0)
-   relapsing panniculitis \[Weber-Christian\] (M35.6)
-   viral warts (B07.-)
-   zoster (B02.-)

### Use additional code

Add a second code for the following, when documented.

-   code (B95-B97) to identify infectious agent.

## Related codes

-   [`L03.327` Acute lymphangitis of buttock ICD-10-CM](https://billingbrief.com/icd10/l03.327/)
-   [`L03.329` Acute lymphangitis of trunk, unspecified ICD-10-CM](https://billingbrief.com/icd10/l03.329/)
-   [`L03.32A` Acute lymphangitis of flank ICD-10-CM](https://billingbrief.com/icd10/l03.32a/)
-   [`L03.811` Cellulitis of head \[any part, except face\] ICD-10-CM](https://billingbrief.com/icd10/l03.811/)
-   [`L03.818` Cellulitis of other sites ICD-10-CM](https://billingbrief.com/icd10/l03.818/)
-   [`L03.891` Acute lymphangitis of head \[any part, except face\] ICD-10-CM](https://billingbrief.com/icd10/l03.891/)
-   [`L03.898` Acute lymphangitis of other sites ICD-10-CM](https://billingbrief.com/icd10/l03.898/)
-   [`L03.90` Cellulitis, unspecified ICD-10-CM](https://billingbrief.com/icd10/l03.90/)

## Common questions

### Is L03.91 a billable code?

Yes. L03.91 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

L03 Cellulitis and acute lymphangitis

Chapter

Diseases of the skin and subcutaneous tissue

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).